java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_compound_exp_cong.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:04:47,425 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:04:47,427 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:04:47,439 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-08 14:04:47,483 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 [2019-01-08 14:04:47,506 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:04:47,506 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:04:47,507 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:04:47,508 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:04:47,508 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:04:47,508 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:04:47,508 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:04:47,508 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:04:47,509 INFO L133 SettingsManager]: * Explicit value domain=true [2019-01-08 14:04:47,509 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:04:47,509 INFO L133 SettingsManager]: * Octagon Domain=false [2019-01-08 14:04:47,509 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2019-01-08 14:04:47,509 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:04:47,510 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:04:47,511 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:04:47,511 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:04:47,512 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:04:47,514 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:04:47,514 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:04:47,514 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:04:47,515 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:04:47,515 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:04:47,515 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:04:47,516 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:04:47,516 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:04:47,516 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:04:47,516 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:04:47,516 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:04:47,517 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:04:47,517 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:04:47,517 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:04:47,517 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:04:47,518 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:04:47,519 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:04:47,519 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:04:47,519 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:04:47,520 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:04:47,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:04:47,520 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:04:47,520 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:04:47,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:04:47,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:04:47,571 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:04:47,572 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:04:47,573 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:04:47,574 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl [2019-01-08 14:04:47,574 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-limited.bpl' [2019-01-08 14:04:47,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:04:47,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:04:47,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:04:47,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:04:47,644 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:04:47,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:04:47,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:04:47,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:04:47,713 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:04:47,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... [2019-01-08 14:04:47,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:04:47,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:04:47,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:04:47,739 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:04:47,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:04:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:04:47,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:04:48,289 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:04:48,289 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-01-08 14:04:48,290 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:04:48 BoogieIcfgContainer [2019-01-08 14:04:48,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:04:48,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:04:48,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:04:48,295 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:04:48,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:04:47" (1/2) ... [2019-01-08 14:04:48,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69dcba08 and model type speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:04:48, skipping insertion in model container [2019-01-08 14:04:48,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-limited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:04:48" (2/2) ... [2019-01-08 14:04:48,299 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-limited.bpl [2019-01-08 14:04:48,310 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:04:48,319 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-01-08 14:04:48,340 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-01-08 14:04:48,381 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:04:48,381 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:04:48,381 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:04:48,382 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:04:48,382 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:04:48,382 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:04:48,382 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:04:48,382 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:04:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-01-08 14:04:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:04:48,417 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:48,418 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:04:48,422 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:48,431 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-01-08 14:04:48,434 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:48,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:48,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:48,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:48,495 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:48,700 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:04:48,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:04:48,701 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:04:48,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:04:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:04:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:04:48,727 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-01-08 14:04:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:48,957 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-01-08 14:04:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:04:48,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:04:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:48,974 INFO L225 Difference]: With dead ends: 33 [2019-01-08 14:04:48,975 INFO L226 Difference]: Without dead ends: 28 [2019-01-08 14:04:48,978 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 [2019-01-08 14:04:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-01-08 14:04:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-01-08 14:04:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-08 14:04:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-01-08 14:04:49,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-01-08 14:04:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:49,019 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-01-08 14:04:49,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:04:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-01-08 14:04:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:04:49,020 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:49,020 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:04:49,021 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-01-08 14:04:49,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:49,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:49,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:49,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:49,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:49,131 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:04:49,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:04:49,131 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:04:49,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:04:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:04:49,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:04:49,134 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-01-08 14:04:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:04:49,384 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-01-08 14:04:49,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:04:49,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-08 14:04:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:04:49,386 INFO L225 Difference]: With dead ends: 28 [2019-01-08 14:04:49,386 INFO L226 Difference]: Without dead ends: 27 [2019-01-08 14:04:49,387 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 [2019-01-08 14:04:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-08 14:04:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-01-08 14:04:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-08 14:04:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-01-08 14:04:49,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-01-08 14:04:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:04:49,393 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-01-08 14:04:49,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:04:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-01-08 14:04:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:04:49,394 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:04:49,394 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:04:49,395 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:04:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-01-08 14:04:49,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:04:49,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:49,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:49,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:04:49,397 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:04:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:49,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:49,584 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:04:49,585 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:04:49,587 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-01-08 14:04:49,628 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:04:49,628 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:04:49,721 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:04:49,722 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:04:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:04:49,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:04:49,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:04:49,729 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 [2019-01-08 14:04:49,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:04:49,741 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:04:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:04:49,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:04:49,965 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-08 14:04:50,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:04:50,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:04:50,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 39 [2019-01-08 14:04:50,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-08 14:04:50,246 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-01-08 14:04:50,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:04:50,297 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,301 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,305 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,309 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,313 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:04:50,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:04:50,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:04:50,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:04:50,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:04:50,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:04:50,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:50,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:04:50,508 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:50,930 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,003 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,043 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,071 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,093 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,148 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. [2019-01-08 14:04:51,149 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-08 14:04:51,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:04:51,282 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 [2019-01-08 14:04:51,284 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:04:51,662 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. [2019-01-08 14:04:51,662 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:04:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:52,866 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:04:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:04:53,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:04:53,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:04:53,004 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:04:53,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:04:53,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:04:53,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:04:53,005 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-01-08 14:05:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:13,103 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-01-08 14:05:13,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:13,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:13,106 INFO L225 Difference]: With dead ends: 54 [2019-01-08 14:05:13,106 INFO L226 Difference]: Without dead ends: 52 [2019-01-08 14:05:13,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-08 14:05:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-01-08 14:05:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-08 14:05:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-01-08 14:05:13,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-01-08 14:05:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:13,113 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-01-08 14:05:13,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-01-08 14:05:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:13,114 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:13,114 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:13,114 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-01-08 14:05:13,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:13,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:13,116 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:13,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:13,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:13,179 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:13,180 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-01-08 14:05:13,182 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:13,182 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:13,192 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:13,193 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:13,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:13,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:13,193 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 [2019-01-08 14:05:13,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:13,205 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:13,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:13,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:05:13,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:05:13,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:05:13,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:05:13,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:05:13,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:05:13,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:05:13,573 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,657 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,694 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,724 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,748 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,768 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,821 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:13,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:05:13,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:05:13,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 39 [2019-01-08 14:05:13,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:13,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-08 14:05:14,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:14,056 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:14,060 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:14,061 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:14,063 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:14,068 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:14,098 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. [2019-01-08 14:05:14,101 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:71, output treesize:54 [2019-01-08 14:05:14,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,199 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 [2019-01-08 14:05:14,200 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:14,299 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. [2019-01-08 14:05:14,300 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:05:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:14,375 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:14,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:05:14,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-08 14:05:14,415 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:14,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:05:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:05:14,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:14,416 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-01-08 14:05:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:14,512 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-01-08 14:05:14,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:05:14,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:05:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:14,514 INFO L225 Difference]: With dead ends: 25 [2019-01-08 14:05:14,514 INFO L226 Difference]: Without dead ends: 24 [2019-01-08 14:05:14,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-08 14:05:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-01-08 14:05:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-08 14:05:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-01-08 14:05:14,522 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-01-08 14:05:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:14,522 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-01-08 14:05:14,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:05:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-01-08 14:05:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:14,523 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:14,523 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:14,524 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-01-08 14:05:14,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:14,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:14,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:14,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:14,526 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:14,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:14,614 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:14,615 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:14,615 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-01-08 14:05:14,617 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:14,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:14,627 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:14,628 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:14,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:14,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:14,629 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 [2019-01-08 14:05:14,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:14,652 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:14,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:14,808 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2019-01-08 14:05:14,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:05:14,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:05:14,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:05:14,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:05:14,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:05:14,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:05:14,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:14,955 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:05:14,957 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,116 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,174 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,206 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,231 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,253 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,281 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:05:15,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:05:15,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:05:15,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:05:15,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,522 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:15,523 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,526 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,529 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,532 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,535 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,593 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. [2019-01-08 14:05:15,594 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-08 14:05:15,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:15,675 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 [2019-01-08 14:05:15,677 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:15,780 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. [2019-01-08 14:05:15,781 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:05:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:16,982 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:17,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:17,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:17,033 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:17,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:17,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:17,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:17,034 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-01-08 14:05:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:36,250 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-01-08 14:05:36,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:36,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:36,252 INFO L225 Difference]: With dead ends: 57 [2019-01-08 14:05:36,252 INFO L226 Difference]: Without dead ends: 56 [2019-01-08 14:05:36,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-08 14:05:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-01-08 14:05:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-08 14:05:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-01-08 14:05:36,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-01-08 14:05:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:36,262 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-01-08 14:05:36,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-01-08 14:05:36,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:05:36,263 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:36,263 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:05:36,264 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:36,264 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-01-08 14:05:36,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:36,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:36,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:36,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:36,266 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:36,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:36,399 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:36,399 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:05:36,399 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-01-08 14:05:36,400 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:36,401 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:36,410 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:36,410 INFO L272 AbstractInterpreter]: Visited 3 different actions 3 times. Never merged. Never widened. Performed 86 root evaluator evaluations with a maximum evaluation depth of 3. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:36,411 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:36,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:36,411 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 [2019-01-08 14:05:36,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:36,421 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:36,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:36,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:05:36,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:05:36,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:05:36,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:05:36,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:05:36,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:05:36,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:05:36,628 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,701 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,744 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,776 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,802 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,825 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,844 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:36,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:05:36,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:05:36,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:05:36,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:36,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:05:37,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:05:37,017 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:37,019 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:37,021 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:37,023 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:37,025 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:37,059 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. [2019-01-08 14:05:37,060 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:54 [2019-01-08 14:05:37,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:37,121 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 [2019-01-08 14:05:37,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:37,226 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. [2019-01-08 14:05:37,226 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:05:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:38,460 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:38,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:05:38,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:05:38,492 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:05:38,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:05:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:05:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:38,492 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-01-08 14:05:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:57,008 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-01-08 14:05:57,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:05:57,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:05:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:57,010 INFO L225 Difference]: With dead ends: 59 [2019-01-08 14:05:57,010 INFO L226 Difference]: Without dead ends: 57 [2019-01-08 14:05:57,010 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:05:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-08 14:05:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-08 14:05:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 14:05:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-01-08 14:05:57,017 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-01-08 14:05:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:57,018 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-01-08 14:05:57,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:05:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-01-08 14:05:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:57,018 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:57,019 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:57,019 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-01-08 14:05:57,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:57,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:57,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:57,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:57,020 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:57,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:05:57,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:05:57,051 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:57,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:05:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:05:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:05:57,051 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 3 states. [2019-01-08 14:05:57,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:57,121 INFO L93 Difference]: Finished difference Result 33 states and 102 transitions. [2019-01-08 14:05:57,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:05:57,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-01-08 14:05:57,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:57,122 INFO L225 Difference]: With dead ends: 33 [2019-01-08 14:05:57,123 INFO L226 Difference]: Without dead ends: 32 [2019-01-08 14:05:57,123 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 [2019-01-08 14:05:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-08 14:05:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-01-08 14:05:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 14:05:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 100 transitions. [2019-01-08 14:05:57,130 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 100 transitions. Word has length 4 [2019-01-08 14:05:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:57,131 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 100 transitions. [2019-01-08 14:05:57,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:05:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 100 transitions. [2019-01-08 14:05:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:57,132 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:57,132 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:57,132 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-01-08 14:05:57,133 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:57,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:57,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:57,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:57,134 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:57,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:57,213 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:57,214 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:57,214 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-01-08 14:05:57,215 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:57,215 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:57,229 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:57,229 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:05:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:57,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:57,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:57,230 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 [2019-01-08 14:05:57,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:57,240 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:57,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:57,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 23 [2019-01-08 14:05:57,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2019-01-08 14:05:57,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 31 [2019-01-08 14:05:57,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 41 [2019-01-08 14:05:57,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2019-01-08 14:05:57,335 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,349 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,355 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,359 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,362 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:05:57,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2019-01-08 14:05:57,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2019-01-08 14:05:57,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2019-01-08 14:05:57,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:05:57,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 81 [2019-01-08 14:05:57,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 100 [2019-01-08 14:05:57,488 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,567 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,594 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,615 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,633 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,649 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,665 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:05:57,697 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. [2019-01-08 14:05:57,698 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:60, output treesize:55 [2019-01-08 14:05:57,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:57,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 104 [2019-01-08 14:05:57,829 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:05:58,077 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-08 14:05:58,078 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:65, output treesize:104 [2019-01-08 14:05:59,583 WARN L181 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-01-08 14:05:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:59,588 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:05:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:59,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:05:59,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2019-01-08 14:05:59,667 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:05:59,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:05:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:05:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:59,668 INFO L87 Difference]: Start difference. First operand 29 states and 100 transitions. Second operand 4 states. [2019-01-08 14:05:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:05:59,722 INFO L93 Difference]: Finished difference Result 33 states and 111 transitions. [2019-01-08 14:05:59,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:05:59,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-08 14:05:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:05:59,724 INFO L225 Difference]: With dead ends: 33 [2019-01-08 14:05:59,724 INFO L226 Difference]: Without dead ends: 32 [2019-01-08 14:05:59,724 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:05:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-08 14:05:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-01-08 14:05:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-01-08 14:05:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 110 transitions. [2019-01-08 14:05:59,732 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 110 transitions. Word has length 4 [2019-01-08 14:05:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:05:59,732 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 110 transitions. [2019-01-08 14:05:59,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:05:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 110 transitions. [2019-01-08 14:05:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:05:59,733 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:05:59,733 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:05:59,733 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:05:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-01-08 14:05:59,734 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:05:59,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:59,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:59,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:05:59,735 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:05:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:05:59,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:59,853 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:05:59,853 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:05:59,853 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-01-08 14:05:59,854 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:05:59,855 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:05:59,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:05:59,862 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:05:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:05:59,862 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:05:59,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:05:59,863 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 [2019-01-08 14:05:59,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:05:59,873 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:05:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:05:59,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:05:59,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:05:59,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:59,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:05:59,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:59,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:59,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:05:59,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:59,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:59,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:05:59,993 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 31 treesize of output 57 [2019-01-08 14:06:00,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:06:00,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:06:00,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:06:00,060 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,120 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,157 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,184 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,206 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,223 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,238 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:06:00,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:06:00,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 39 [2019-01-08 14:06:00,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-08 14:06:00,434 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-01-08 14:06:00,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:00,444 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,447 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,449 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,450 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,452 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,481 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. [2019-01-08 14:06:00,481 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-08 14:06:00,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,534 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 [2019-01-08 14:06:00,536 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,723 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. [2019-01-08 14:06:00,723 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:06:00,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:00,849 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-01-08 14:06:00,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-08 14:06:00,851 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:00,953 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. [2019-01-08 14:06:00,954 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:06:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:03,240 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:03,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:03,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:03,292 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:03,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:03,293 INFO L87 Difference]: Start difference. First operand 31 states and 110 transitions. Second operand 8 states. [2019-01-08 14:06:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:06:40,848 INFO L93 Difference]: Finished difference Result 74 states and 179 transitions. [2019-01-08 14:06:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:06:40,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:06:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:06:40,852 INFO L225 Difference]: With dead ends: 74 [2019-01-08 14:06:40,852 INFO L226 Difference]: Without dead ends: 72 [2019-01-08 14:06:40,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:06:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-01-08 14:06:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 38. [2019-01-08 14:06:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-08 14:06:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-08 14:06:40,860 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-08 14:06:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:06:40,860 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-08 14:06:40,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:06:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-08 14:06:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:06:40,861 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:06:40,861 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:06:40,862 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:06:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-01-08 14:06:40,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:06:40,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:40,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:40,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:06:40,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:06:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:41,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:41,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:06:41,032 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:06:41,032 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-01-08 14:06:41,033 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:06:41,033 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:06:41,040 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:06:41,040 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:06:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:06:41,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:06:41,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:06:41,041 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 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 [2019-01-08 14:06:41,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:06:41,053 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:06:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:06:41,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:06:41,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:06:41,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:06:41,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:06:41,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:06:41,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:06:41,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:06:41,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:06:41,201 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,258 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,291 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,319 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,341 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,360 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,378 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-08 14:06:41,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-08 14:06:41,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-08 14:06:41,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 59 [2019-01-08 14:06:41,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:06:41,517 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,519 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,522 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,524 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,526 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,555 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. [2019-01-08 14:06:41,555 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:85, output treesize:54 [2019-01-08 14:06:41,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,681 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 [2019-01-08 14:06:41,682 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:41,762 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. [2019-01-08 14:06:41,763 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:06:41,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:06:41,984 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:06:41,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-08 14:06:41,986 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:06:42,712 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. [2019-01-08 14:06:42,713 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-08 14:06:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:44,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:06:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:06:45,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:06:45,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:06:45,029 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:06:45,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:06:45,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:06:45,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:06:45,030 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-08 14:07:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:07:24,283 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-08 14:07:24,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:07:24,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:07:24,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:07:24,285 INFO L225 Difference]: With dead ends: 71 [2019-01-08 14:07:24,285 INFO L226 Difference]: Without dead ends: 70 [2019-01-08 14:07:24,286 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:07:24,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-01-08 14:07:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2019-01-08 14:07:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-08 14:07:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 139 transitions. [2019-01-08 14:07:24,297 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 139 transitions. Word has length 4 [2019-01-08 14:07:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:07:24,297 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 139 transitions. [2019-01-08 14:07:24,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:07:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 139 transitions. [2019-01-08 14:07:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:07:24,298 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:07:24,298 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:07:24,298 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:07:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-01-08 14:07:24,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:07:24,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:24,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:24,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:07:24,300 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:07:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:24,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:24,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:07:24,399 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:07:24,399 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-01-08 14:07:24,400 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:07:24,400 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:07:24,407 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:07:24,407 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:07:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:07:24,407 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:07:24,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:07:24,408 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 [2019-01-08 14:07:24,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:07:24,420 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:07:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:07:24,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:07:24,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:07:24,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:07:24,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:07:24,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:07:24,812 WARN L181 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2019-01-08 14:07:24,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:07:24,822 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:24,825 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:24,826 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:24,828 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:24,830 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:24,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:07:24,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,855 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 27 treesize of output 33 [2019-01-08 14:07:24,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:07:24,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:07:24,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:07:24,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:07:24,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:24,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:07:24,962 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,018 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,049 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,072 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,090 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,106 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,120 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,148 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. [2019-01-08 14:07:25,149 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:07:25,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,207 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 [2019-01-08 14:07:25,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,284 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. [2019-01-08 14:07:25,284 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:07:25,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:07:25,420 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:07:25,421 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 [2019-01-08 14:07:25,422 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:07:25,523 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. [2019-01-08 14:07:25,524 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:54 [2019-01-08 14:07:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,805 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:07:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:07:27,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:07:27,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:07:27,848 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:07:27,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:07:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:07:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:07:27,849 INFO L87 Difference]: Start difference. First operand 38 states and 139 transitions. Second operand 8 states. [2019-01-08 14:08:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:02,713 INFO L93 Difference]: Finished difference Result 71 states and 181 transitions. [2019-01-08 14:08:02,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:08:02,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:08:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:02,715 INFO L225 Difference]: With dead ends: 71 [2019-01-08 14:08:02,715 INFO L226 Difference]: Without dead ends: 69 [2019-01-08 14:08:02,715 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:02,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-01-08 14:08:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-01-08 14:08:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-01-08 14:08:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 138 transitions. [2019-01-08 14:08:02,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 138 transitions. Word has length 4 [2019-01-08 14:08:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:02,725 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 138 transitions. [2019-01-08 14:08:02,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 138 transitions. [2019-01-08 14:08:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:08:02,726 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:02,726 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:08:02,726 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:02,727 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-01-08 14:08:02,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:02,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:02,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:02,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:02,728 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:02,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:02,864 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:02,864 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:08:02,865 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-01-08 14:08:02,866 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:02,866 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:02,875 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:02,875 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:08:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:02,876 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:02,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:02,876 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 [2019-01-08 14:08:02,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:02,889 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:02,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:03,012 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-01-08 14:08:03,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:08:03,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:08:03,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:08:03,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:08:03,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:08:03,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:08:03,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:08:03,110 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,177 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,211 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,237 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,257 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,274 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,290 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,330 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:08:03,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:08:03,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 39 [2019-01-08 14:08:03,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-08 14:08:03,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:08:03,414 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,417 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,418 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,420 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,425 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,452 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. [2019-01-08 14:08:03,452 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-08 14:08:03,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,549 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 [2019-01-08 14:08:03,550 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,636 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. [2019-01-08 14:08:03,636 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:08:03,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:03,851 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 [2019-01-08 14:08:03,852 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:03,976 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. [2019-01-08 14:08:03,977 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:08:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:06,279 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:06,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:06,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:08:06,320 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:06,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:08:06,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:08:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:08:06,321 INFO L87 Difference]: Start difference. First operand 37 states and 138 transitions. Second operand 8 states. [2019-01-08 14:08:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:41,789 INFO L93 Difference]: Finished difference Result 74 states and 200 transitions. [2019-01-08 14:08:41,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:08:41,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:08:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:41,790 INFO L225 Difference]: With dead ends: 74 [2019-01-08 14:08:41,790 INFO L226 Difference]: Without dead ends: 63 [2019-01-08 14:08:41,791 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-01-08 14:08:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2019-01-08 14:08:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-08 14:08:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 155 transitions. [2019-01-08 14:08:41,799 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 155 transitions. Word has length 4 [2019-01-08 14:08:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:41,799 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 155 transitions. [2019-01-08 14:08:41,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 155 transitions. [2019-01-08 14:08:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:08:41,800 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:41,800 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:08:41,800 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 941284, now seen corresponding path program 1 times [2019-01-08 14:08:41,801 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:41,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:41,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:41,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:41,802 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:41,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:41,909 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:41,910 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:08:41,910 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [31] [2019-01-08 14:08:41,911 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:41,911 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:41,925 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:41,925 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:08:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:41,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:41,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:41,926 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 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 [2019-01-08 14:08:41,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:41,942 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:41,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:42,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:08:42,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:08:42,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,012 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 25 treesize of output 39 [2019-01-08 14:08:42,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-08 14:08:42,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:08:42,051 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,053 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,055 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,058 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,060 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:08:42,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:08:42,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:08:42,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:08:42,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,116 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 33 treesize of output 75 [2019-01-08 14:08:42,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:08:42,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:08:42,137 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,196 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,226 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,249 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,267 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,283 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,297 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,325 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. [2019-01-08 14:08:42,325 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:71, output treesize:54 [2019-01-08 14:08:42,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,378 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 [2019-01-08 14:08:42,379 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,460 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. [2019-01-08 14:08:42,460 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:08:42,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:42,537 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 [2019-01-08 14:08:42,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:42,626 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. [2019-01-08 14:08:42,626 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:08:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:44,938 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:08:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:45,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:08:45,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:08:45,042 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:08:45,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:08:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:08:45,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:08:45,043 INFO L87 Difference]: Start difference. First operand 35 states and 155 transitions. Second operand 8 states. [2019-01-08 14:08:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:08:58,313 INFO L93 Difference]: Finished difference Result 67 states and 213 transitions. [2019-01-08 14:08:58,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:08:58,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:08:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:08:58,315 INFO L225 Difference]: With dead ends: 67 [2019-01-08 14:08:58,315 INFO L226 Difference]: Without dead ends: 65 [2019-01-08 14:08:58,316 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:08:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-08 14:08:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-01-08 14:08:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-08 14:08:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 178 transitions. [2019-01-08 14:08:58,324 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 178 transitions. Word has length 4 [2019-01-08 14:08:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:08:58,325 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 178 transitions. [2019-01-08 14:08:58,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:08:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 178 transitions. [2019-01-08 14:08:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:08:58,325 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:08:58,326 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:08:58,326 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:08:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-01-08 14:08:58,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:08:58,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:58,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:58,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:08:58,327 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:08:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:08:58,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:58,378 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:08:58,378 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:08:58,379 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [33] [2019-01-08 14:08:58,382 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:08:58,382 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:08:58,391 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:08:58,391 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:08:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:08:58,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:08:58,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:08:58,392 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 [2019-01-08 14:08:58,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:08:58,403 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:08:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:08:58,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:08:58,452 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 24 treesize of output 27 [2019-01-08 14:08:58,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:08:58,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-08 14:08:58,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 49 [2019-01-08 14:08:58,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 63 [2019-01-08 14:08:58,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,498 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 85 [2019-01-08 14:08:58,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 104 [2019-01-08 14:08:58,536 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,602 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,630 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,657 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,676 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,693 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,709 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:08:58,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:08:58,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2019-01-08 14:08:58,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 45 [2019-01-08 14:08:58,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 33 [2019-01-08 14:08:58,797 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,809 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,862 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,866 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,871 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:08:58,902 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. [2019-01-08 14:08:58,902 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:68, output treesize:59 [2019-01-08 14:08:58,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:58,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:08:59,086 INFO L303 Elim1Store]: Index analysis took 159 ms [2019-01-08 14:08:59,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 120 [2019-01-08 14:08:59,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-08 14:08:59,503 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-08 14:08:59,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:69, output treesize:236 [2019-01-08 14:09:22,070 WARN L181 SmtUtils]: Spent 21.70 s on a formula simplification that was a NOOP. DAG size: 126 [2019-01-08 14:09:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:22,077 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:09:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:09:22,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:09:22,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:09:22,117 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:09:22,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:09:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:09:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:09:22,118 INFO L87 Difference]: Start difference. First operand 38 states and 178 transitions. Second operand 6 states. [2019-01-08 14:10:07,726 WARN L181 SmtUtils]: Spent 45.48 s on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2019-01-08 14:10:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:10:10,481 INFO L93 Difference]: Finished difference Result 63 states and 216 transitions. [2019-01-08 14:10:10,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:10:10,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:10:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:10:10,482 INFO L225 Difference]: With dead ends: 63 [2019-01-08 14:10:10,482 INFO L226 Difference]: Without dead ends: 62 [2019-01-08 14:10:10,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:10:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-01-08 14:10:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2019-01-08 14:10:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-01-08 14:10:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 186 transitions. [2019-01-08 14:10:10,490 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 186 transitions. Word has length 4 [2019-01-08 14:10:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:10:10,491 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 186 transitions. [2019-01-08 14:10:10,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:10:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 186 transitions. [2019-01-08 14:10:10,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:10:10,491 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:10:10,492 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:10:10,492 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:10:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:10,492 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2019-01-08 14:10:10,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:10:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:10,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:10,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:10:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:10,703 WARN L181 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2019-01-08 14:10:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:10,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:10,731 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:10:10,731 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:10:10,731 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2019-01-08 14:10:10,734 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:10:10,734 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:10:10,740 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:10:10,740 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:10:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:10,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:10:10,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:10,740 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 [2019-01-08 14:10:10,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:10,754 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:10:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:10,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:10:10,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:10:10,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:10:10,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:10:10,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:10:10,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:10:10,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:10:10,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:10,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:10:10,947 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,000 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,033 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,059 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,079 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,096 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,111 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:10:11,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:10:11,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,164 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 39 [2019-01-08 14:10:11,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 53 [2019-01-08 14:10:11,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:10:11,200 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,203 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,205 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,207 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,210 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,242 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. [2019-01-08 14:10:11,242 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:71, output treesize:54 [2019-01-08 14:10:11,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,292 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 [2019-01-08 14:10:11,293 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,389 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. [2019-01-08 14:10:11,390 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:10:11,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:11,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 132 [2019-01-08 14:10:11,482 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:11,631 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. [2019-01-08 14:10:11,631 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:10:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:12,852 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:10:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:12,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:10:12,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:10:12,897 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:10:12,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:10:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:10:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:10:12,898 INFO L87 Difference]: Start difference. First operand 39 states and 186 transitions. Second operand 8 states. [2019-01-08 14:10:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:10:35,673 INFO L93 Difference]: Finished difference Result 92 states and 272 transitions. [2019-01-08 14:10:35,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:10:35,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:10:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:10:35,675 INFO L225 Difference]: With dead ends: 92 [2019-01-08 14:10:35,675 INFO L226 Difference]: Without dead ends: 90 [2019-01-08 14:10:35,676 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:10:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-08 14:10:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2019-01-08 14:10:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-01-08 14:10:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 222 transitions. [2019-01-08 14:10:35,686 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 222 transitions. Word has length 4 [2019-01-08 14:10:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:10:35,687 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 222 transitions. [2019-01-08 14:10:35,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:10:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 222 transitions. [2019-01-08 14:10:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:10:35,688 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:10:35,688 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:10:35,688 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:10:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 929628, now seen corresponding path program 1 times [2019-01-08 14:10:35,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:10:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:35,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:35,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:35,689 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:10:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:35,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:35,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:10:35,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:10:35,797 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [31] [2019-01-08 14:10:35,799 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:10:35,799 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:10:35,804 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:10:35,804 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:10:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:35,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:10:35,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:35,804 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 [2019-01-08 14:10:35,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:35,813 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:10:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:35,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:10:35,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:10:35,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,909 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:10:35,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:10:35,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:10:35,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:10:35,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:10:35,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:35,955 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:10:35,956 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,015 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,049 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,075 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,099 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,117 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,135 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-08 14:10:36,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-08 14:10:36,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-08 14:10:36,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 59 [2019-01-08 14:10:36,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,274 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:10:36,275 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,277 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,279 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,280 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,281 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,309 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. [2019-01-08 14:10:36,310 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:85, output treesize:54 [2019-01-08 14:10:36,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,361 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 [2019-01-08 14:10:36,362 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,443 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. [2019-01-08 14:10:36,444 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:10:36,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:36,497 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 [2019-01-08 14:10:36,498 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:36,589 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. [2019-01-08 14:10:36,590 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:10:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:37,820 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:10:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:37,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:10:37,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:10:37,859 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:10:37,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:10:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:10:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:10:37,860 INFO L87 Difference]: Start difference. First operand 46 states and 222 transitions. Second operand 8 states. [2019-01-08 14:10:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:10:58,838 INFO L93 Difference]: Finished difference Result 96 states and 311 transitions. [2019-01-08 14:10:58,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:10:58,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:10:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:10:58,840 INFO L225 Difference]: With dead ends: 96 [2019-01-08 14:10:58,840 INFO L226 Difference]: Without dead ends: 95 [2019-01-08 14:10:58,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:10:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-08 14:10:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2019-01-08 14:10:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-01-08 14:10:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 262 transitions. [2019-01-08 14:10:58,852 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 262 transitions. Word has length 4 [2019-01-08 14:10:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:10:58,853 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 262 transitions. [2019-01-08 14:10:58,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:10:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 262 transitions. [2019-01-08 14:10:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:10:58,853 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:10:58,854 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:10:58,854 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:10:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash 930124, now seen corresponding path program 1 times [2019-01-08 14:10:58,854 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:10:58,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:58,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:58,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:10:58,855 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:10:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:10:58,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:58,964 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:10:58,964 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:10:58,964 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [31] [2019-01-08 14:10:58,966 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:10:58,966 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:10:58,970 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:10:58,971 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:10:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:10:58,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:10:58,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:10:58,971 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 [2019-01-08 14:10:58,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:10:58,986 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:10:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:10:58,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:10:59,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-08 14:10:59,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-08 14:10:59,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 64 [2019-01-08 14:10:59,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 59 [2019-01-08 14:10:59,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:10:59,148 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,151 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,153 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,155 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,157 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:10:59,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:10:59,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:10:59,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:10:59,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:10:59,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,354 INFO L303 Elim1Store]: Index analysis took 148 ms [2019-01-08 14:10:59,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:10:59,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,501 INFO L303 Elim1Store]: Index analysis took 144 ms [2019-01-08 14:10:59,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:10:59,503 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,703 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,734 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,758 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,777 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,792 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,806 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,835 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. [2019-01-08 14:10:59,835 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:85, output treesize:54 [2019-01-08 14:10:59,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:10:59,891 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 [2019-01-08 14:10:59,892 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:10:59,977 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. [2019-01-08 14:10:59,977 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:11:00,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:00,032 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 [2019-01-08 14:11:00,033 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:00,124 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. [2019-01-08 14:11:00,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:11:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:01,381 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:11:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:01,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:11:01,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:11:01,492 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:11:01,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:11:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:11:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:11:01,493 INFO L87 Difference]: Start difference. First operand 51 states and 262 transitions. Second operand 8 states. [2019-01-08 14:11:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:11:22,628 INFO L93 Difference]: Finished difference Result 100 states and 343 transitions. [2019-01-08 14:11:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:11:22,629 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:11:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:11:22,630 INFO L225 Difference]: With dead ends: 100 [2019-01-08 14:11:22,631 INFO L226 Difference]: Without dead ends: 98 [2019-01-08 14:11:22,631 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:11:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-08 14:11:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2019-01-08 14:11:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-08 14:11:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 297 transitions. [2019-01-08 14:11:22,642 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 297 transitions. Word has length 4 [2019-01-08 14:11:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:11:22,642 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 297 transitions. [2019-01-08 14:11:22,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:11:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 297 transitions. [2019-01-08 14:11:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:11:22,643 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:11:22,643 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:11:22,643 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:11:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2019-01-08 14:11:22,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:11:22,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:22,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:22,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:22,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:11:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:22,833 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2019-01-08 14:11:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:22,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:22,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:11:22,837 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:11:22,837 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2019-01-08 14:11:22,839 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:11:22,839 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:11:22,844 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:11:22,844 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:11:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:22,845 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:11:22,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:22,845 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 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 [2019-01-08 14:11:22,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:22,856 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:11:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:22,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:11:22,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:11:22,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:11:22,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-08 14:11:22,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:11:22,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-08 14:11:22,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:22,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-08 14:11:23,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-08 14:11:23,011 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,057 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,086 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,110 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,129 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,147 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,164 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-08 14:11:23,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-08 14:11:23,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,230 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-08 14:11:23,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-08 14:11:23,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:11:23,265 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,279 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,289 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,296 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,303 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:23,335 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. [2019-01-08 14:11:23,336 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-08 14:11:23,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:23,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-08 14:11:23,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:11:23,607 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-08 14:11:23,608 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:114 [2019-01-08 14:11:24,938 WARN L181 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-01-08 14:11:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:24,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:11:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:25,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:11:25,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:11:25,218 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:11:25,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:11:25,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:11:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:11:25,219 INFO L87 Difference]: Start difference. First operand 57 states and 297 transitions. Second operand 6 states. [2019-01-08 14:11:25,627 WARN L181 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-01-08 14:11:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:11:28,436 INFO L93 Difference]: Finished difference Result 81 states and 327 transitions. [2019-01-08 14:11:28,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:11:28,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:11:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:11:28,437 INFO L225 Difference]: With dead ends: 81 [2019-01-08 14:11:28,437 INFO L226 Difference]: Without dead ends: 80 [2019-01-08 14:11:28,437 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:11:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-08 14:11:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2019-01-08 14:11:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-01-08 14:11:28,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 297 transitions. [2019-01-08 14:11:28,448 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 297 transitions. Word has length 4 [2019-01-08 14:11:28,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:11:28,448 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 297 transitions. [2019-01-08 14:11:28,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:11:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 297 transitions. [2019-01-08 14:11:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:11:28,449 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:11:28,449 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:11:28,450 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:11:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2019-01-08 14:11:28,450 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:11:28,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:28,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:28,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:28,451 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:11:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:28,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:28,521 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:11:28,521 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:11:28,521 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2019-01-08 14:11:28,523 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:11:28,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:11:28,527 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:11:28,527 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:11:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:28,528 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:11:28,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:28,528 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 [2019-01-08 14:11:28,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:28,556 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:11:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:28,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:11:28,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:11:28,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:11:28,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:11:28,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:11:28,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:11:28,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:11:28,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:11:28,711 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,768 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,801 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,828 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,851 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,869 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,887 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:28,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:11:28,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:11:28,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:11:28,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:28,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:11:29,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:11:29,053 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,055 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,056 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,057 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,062 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,088 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. [2019-01-08 14:11:29,089 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:11:29,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,147 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 [2019-01-08 14:11:29,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,237 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. [2019-01-08 14:11:29,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:11:29,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:29,436 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 [2019-01-08 14:11:29,437 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:29,527 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. [2019-01-08 14:11:29,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:11:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:31,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:11:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:32,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:11:32,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:11:32,030 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:11:32,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:11:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:11:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:11:32,030 INFO L87 Difference]: Start difference. First operand 57 states and 297 transitions. Second operand 8 states. [2019-01-08 14:11:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:11:56,758 INFO L93 Difference]: Finished difference Result 98 states and 365 transitions. [2019-01-08 14:11:56,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:11:56,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:11:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:11:56,760 INFO L225 Difference]: With dead ends: 98 [2019-01-08 14:11:56,760 INFO L226 Difference]: Without dead ends: 97 [2019-01-08 14:11:56,761 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:11:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-01-08 14:11:56,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 59. [2019-01-08 14:11:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-08 14:11:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 313 transitions. [2019-01-08 14:11:56,774 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 313 transitions. Word has length 4 [2019-01-08 14:11:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:11:56,774 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 313 transitions. [2019-01-08 14:11:56,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:11:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 313 transitions. [2019-01-08 14:11:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:11:56,775 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:11:56,775 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:11:56,776 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:11:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:56,776 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2019-01-08 14:11:56,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:11:56,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:56,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:56,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:11:56,777 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:11:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:11:56,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:56,888 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:11:56,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:11:56,888 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2019-01-08 14:11:56,889 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:11:56,889 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:11:56,893 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:11:56,893 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:11:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:11:56,893 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:11:56,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:11:56,894 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 [2019-01-08 14:11:56,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:11:56,908 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:11:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:11:56,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:11:57,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:11:57,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:11:57,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:11:57,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:11:57,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:11:57,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:11:57,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:11:57,066 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,125 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,159 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,183 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,205 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,224 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,241 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:11:57,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:11:57,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:11:57,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:11:57,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:11:57,382 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,384 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,386 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,388 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,390 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,417 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. [2019-01-08 14:11:57,417 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:11:57,545 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-01-08 14:11:57,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,619 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 [2019-01-08 14:11:57,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,705 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. [2019-01-08 14:11:57,705 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:11:57,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:11:57,778 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 46 treesize of output 140 [2019-01-08 14:11:57,779 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:11:57,870 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. [2019-01-08 14:11:57,870 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:64, output treesize:54 [2019-01-08 14:12:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:00,368 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:12:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:00,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:12:00,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:12:00,412 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:12:00,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:12:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:12:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:12:00,413 INFO L87 Difference]: Start difference. First operand 59 states and 313 transitions. Second operand 8 states. [2019-01-08 14:12:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:12:28,805 INFO L93 Difference]: Finished difference Result 100 states and 381 transitions. [2019-01-08 14:12:28,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:12:28,805 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:12:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:12:28,807 INFO L225 Difference]: With dead ends: 100 [2019-01-08 14:12:28,807 INFO L226 Difference]: Without dead ends: 98 [2019-01-08 14:12:28,807 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:12:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-08 14:12:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2019-01-08 14:12:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-08 14:12:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 342 transitions. [2019-01-08 14:12:28,820 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 342 transitions. Word has length 4 [2019-01-08 14:12:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:12:28,820 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 342 transitions. [2019-01-08 14:12:28,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:12:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 342 transitions. [2019-01-08 14:12:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:12:28,821 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:12:28,821 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:12:28,822 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:12:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2019-01-08 14:12:28,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:12:28,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:28,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:28,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:28,823 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:12:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:28,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:28,915 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:12:28,915 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:12:28,915 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2019-01-08 14:12:28,919 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:12:28,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:12:28,922 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:12:28,923 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:12:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:28,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:12:28,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:28,923 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 [2019-01-08 14:12:28,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:28,934 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:12:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:28,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:12:29,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:12:29,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:12:29,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:12:29,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:12:29,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:12:29,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:12:29,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:12:29,138 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,192 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,223 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,248 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,266 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,282 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,296 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,328 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2019-01-08 14:12:29,329 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,355 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. [2019-01-08 14:12:29,356 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:51, output treesize:54 [2019-01-08 14:12:29,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,405 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 [2019-01-08 14:12:29,406 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,492 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. [2019-01-08 14:12:29,492 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:12:29,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:29,561 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:12:29,562 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 [2019-01-08 14:12:29,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:29,654 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. [2019-01-08 14:12:29,654 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:12:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:32,158 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:12:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:32,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:12:32,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:12:32,198 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:12:32,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:12:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:12:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:12:32,199 INFO L87 Difference]: Start difference. First operand 65 states and 342 transitions. Second operand 8 states. [2019-01-08 14:12:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:12:59,353 INFO L93 Difference]: Finished difference Result 101 states and 390 transitions. [2019-01-08 14:12:59,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:12:59,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:12:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:12:59,355 INFO L225 Difference]: With dead ends: 101 [2019-01-08 14:12:59,355 INFO L226 Difference]: Without dead ends: 99 [2019-01-08 14:12:59,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:12:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-08 14:12:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-08 14:12:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-08 14:12:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 350 transitions. [2019-01-08 14:12:59,366 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 350 transitions. Word has length 4 [2019-01-08 14:12:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:12:59,366 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 350 transitions. [2019-01-08 14:12:59,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:12:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 350 transitions. [2019-01-08 14:12:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:12:59,367 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:12:59,367 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:12:59,367 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:12:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:59,368 INFO L82 PathProgramCache]: Analyzing trace with hash 934030, now seen corresponding path program 1 times [2019-01-08 14:12:59,368 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:12:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:59,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:59,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:12:59,369 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:12:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:12:59,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:59,462 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:12:59,462 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:12:59,463 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [31] [2019-01-08 14:12:59,463 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:12:59,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:12:59,467 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:12:59,467 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:12:59,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:12:59,468 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:12:59,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:12:59,468 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 [2019-01-08 14:12:59,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:12:59,492 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:12:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:12:59,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:12:59,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:12:59,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:12:59,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:12:59,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:12:59,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:12:59,695 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,698 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,700 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,702 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,704 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:12:59,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:12:59,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:12:59,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:12:59,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:12:59,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:12:59,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:12:59,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:12:59,836 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,902 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:12:59,933 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,135 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,154 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,169 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,183 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,210 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. [2019-01-08 14:13:00,210 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:13:00,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 126 [2019-01-08 14:13:00,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,348 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. [2019-01-08 14:13:00,348 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:13:00,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:00,557 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 [2019-01-08 14:13:00,558 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:00,644 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. [2019-01-08 14:13:00,644 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:13:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:03,096 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:13:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:03,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:13:03,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:13:03,136 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:13:03,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:13:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:13:03,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:13:03,137 INFO L87 Difference]: Start difference. First operand 66 states and 350 transitions. Second operand 8 states. [2019-01-08 14:13:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:13:28,452 INFO L93 Difference]: Finished difference Result 105 states and 409 transitions. [2019-01-08 14:13:28,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:13:28,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:13:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:13:28,456 INFO L225 Difference]: With dead ends: 105 [2019-01-08 14:13:28,456 INFO L226 Difference]: Without dead ends: 101 [2019-01-08 14:13:28,457 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:13:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-08 14:13:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2019-01-08 14:13:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-01-08 14:13:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 372 transitions. [2019-01-08 14:13:28,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 372 transitions. Word has length 4 [2019-01-08 14:13:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:13:28,470 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 372 transitions. [2019-01-08 14:13:28,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:13:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 372 transitions. [2019-01-08 14:13:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:13:28,470 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:13:28,471 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:13:28,471 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:13:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash 933596, now seen corresponding path program 1 times [2019-01-08 14:13:28,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:13:28,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:28,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:28,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:28,472 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:13:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:28,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:28,571 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:13:28,571 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:13:28,571 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [31] [2019-01-08 14:13:28,572 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:13:28,572 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:13:28,576 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:13:28,576 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:13:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:28,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:13:28,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:28,577 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 [2019-01-08 14:13:28,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:28,586 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:13:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:28,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:13:28,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:13:28,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:13:28,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:13:28,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:13:28,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:13:28,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:13:28,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:13:28,736 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,793 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,826 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,853 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,875 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,893 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,910 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:28,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:13:28,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:13:28,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:13:28,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:28,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:13:29,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:13:29,049 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,051 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,053 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,055 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,057 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,085 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. [2019-01-08 14:13:29,085 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:13:29,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,131 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 [2019-01-08 14:13:29,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,218 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. [2019-01-08 14:13:29,219 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:13:29,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:29,274 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 [2019-01-08 14:13:29,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:29,362 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. [2019-01-08 14:13:29,362 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:13:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:31,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:13:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:31,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:13:31,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:13:31,911 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:13:31,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:13:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:13:31,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:13:31,911 INFO L87 Difference]: Start difference. First operand 72 states and 372 transitions. Second operand 8 states. [2019-01-08 14:13:49,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:13:49,334 INFO L93 Difference]: Finished difference Result 104 states and 422 transitions. [2019-01-08 14:13:49,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:13:49,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:13:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:13:49,336 INFO L225 Difference]: With dead ends: 104 [2019-01-08 14:13:49,336 INFO L226 Difference]: Without dead ends: 102 [2019-01-08 14:13:49,337 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:13:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-01-08 14:13:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2019-01-08 14:13:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-01-08 14:13:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 387 transitions. [2019-01-08 14:13:49,351 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 387 transitions. Word has length 4 [2019-01-08 14:13:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:13:49,352 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 387 transitions. [2019-01-08 14:13:49,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:13:49,352 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 387 transitions. [2019-01-08 14:13:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:13:49,352 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:13:49,352 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:13:49,353 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:13:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:49,353 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2019-01-08 14:13:49,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:13:49,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:49,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:49,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:13:49,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:13:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:49,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:49,454 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:13:49,454 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:13:49,455 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2019-01-08 14:13:49,455 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:13:49,455 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:13:49,459 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:13:49,459 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:13:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:13:49,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:13:49,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:13:49,460 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 [2019-01-08 14:13:49,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:13:49,471 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:13:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:13:49,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:13:49,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,574 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:13:49,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:13:49,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:13:49,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:13:49,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:13:49,691 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,693 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,694 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,696 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,699 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:13:49,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:13:49,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:13:49,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:13:49,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:13:49,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:13:49,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:13:49,785 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,840 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,871 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,895 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,912 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,928 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,941 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:13:49,966 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. [2019-01-08 14:13:49,966 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:13:49,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:49,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,015 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 [2019-01-08 14:13:50,016 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:50,097 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. [2019-01-08 14:13:50,097 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:13:50,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:13:50,302 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 [2019-01-08 14:13:50,303 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:13:50,391 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. [2019-01-08 14:13:50,391 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:13:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:52,826 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:13:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:13:52,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:13:52,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:13:52,873 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:13:52,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:13:52,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:13:52,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:13:52,873 INFO L87 Difference]: Start difference. First operand 74 states and 387 transitions. Second operand 8 states. [2019-01-08 14:14:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:14:21,245 INFO L93 Difference]: Finished difference Result 114 states and 447 transitions. [2019-01-08 14:14:21,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:14:21,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:14:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:14:21,248 INFO L225 Difference]: With dead ends: 114 [2019-01-08 14:14:21,248 INFO L226 Difference]: Without dead ends: 111 [2019-01-08 14:14:21,248 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:14:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-01-08 14:14:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2019-01-08 14:14:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-01-08 14:14:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 411 transitions. [2019-01-08 14:14:21,261 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 411 transitions. Word has length 4 [2019-01-08 14:14:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:14:21,261 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 411 transitions. [2019-01-08 14:14:21,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:14:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 411 transitions. [2019-01-08 14:14:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:14:21,262 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:14:21,262 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:14:21,262 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:14:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash 948972, now seen corresponding path program 1 times [2019-01-08 14:14:21,262 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:14:21,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:21,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:21,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:21,263 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:14:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:21,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:21,378 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:14:21,378 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:14:21,378 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [31] [2019-01-08 14:14:21,378 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:14:21,379 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:14:21,381 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:14:21,382 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:14:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:21,382 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:14:21,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:21,382 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 [2019-01-08 14:14:21,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:21,390 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:14:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:21,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:14:21,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:14:21,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:14:21,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:14:21,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:14:21,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:14:21,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:14:21,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:14:21,559 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,619 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,653 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,677 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,697 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,715 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,733 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 46 [2019-01-08 14:14:21,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2019-01-08 14:14:21,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 45 [2019-01-08 14:14:21,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 59 [2019-01-08 14:14:21,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2019-01-08 14:14:21,871 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,874 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,876 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,878 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,880 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:21,909 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. [2019-01-08 14:14:21,909 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:82, output treesize:54 [2019-01-08 14:14:21,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:21,965 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 [2019-01-08 14:14:21,966 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:22,064 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. [2019-01-08 14:14:22,065 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:54 [2019-01-08 14:14:22,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:22,148 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 [2019-01-08 14:14:22,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:22,239 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. [2019-01-08 14:14:22,240 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:66, output treesize:56 [2019-01-08 14:14:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:24,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:14:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:24,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:14:24,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:14:24,748 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:14:24,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:14:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:14:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:14:24,749 INFO L87 Difference]: Start difference. First operand 81 states and 411 transitions. Second operand 8 states. [2019-01-08 14:14:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:14:48,371 INFO L93 Difference]: Finished difference Result 114 states and 461 transitions. [2019-01-08 14:14:48,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:14:48,373 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:14:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:14:48,375 INFO L225 Difference]: With dead ends: 114 [2019-01-08 14:14:48,375 INFO L226 Difference]: Without dead ends: 112 [2019-01-08 14:14:48,376 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:14:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-01-08 14:14:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2019-01-08 14:14:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-08 14:14:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-08 14:14:48,390 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-08 14:14:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:14:48,390 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-08 14:14:48,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:14:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-08 14:14:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:14:48,391 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:14:48,391 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:14:48,391 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:14:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 951454, now seen corresponding path program 1 times [2019-01-08 14:14:48,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:14:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:48,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:48,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:48,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:14:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:48,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:48,465 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:14:48,465 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:14:48,465 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [33] [2019-01-08 14:14:48,465 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:14:48,466 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:14:48,468 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:14:48,468 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:14:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:48,469 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:14:48,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:48,470 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 [2019-01-08 14:14:48,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:48,480 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:14:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:48,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:14:48,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:14:48,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:14:48,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-08 14:14:48,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:14:48,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-08 14:14:48,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-08 14:14:48,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-08 14:14:48,599 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,648 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,676 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,700 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,734 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,750 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-08 14:14:48,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-08 14:14:48,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-08 14:14:48,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-08 14:14:48,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,856 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:14:48,856 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,870 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,880 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,887 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,893 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:48,925 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. [2019-01-08 14:14:48,926 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-08 14:14:48,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:48,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-08 14:14:48,979 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:14:49,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-08 14:14:49,164 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:114 [2019-01-08 14:14:50,473 WARN L181 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-01-08 14:14:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:50,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:14:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:50,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:14:50,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:14:50,525 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:14:50,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:14:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:14:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:14:50,525 INFO L87 Difference]: Start difference. First operand 83 states and 426 transitions. Second operand 6 states. [2019-01-08 14:14:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:14:52,558 INFO L93 Difference]: Finished difference Result 107 states and 456 transitions. [2019-01-08 14:14:52,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:14:52,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:14:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:14:52,559 INFO L225 Difference]: With dead ends: 107 [2019-01-08 14:14:52,559 INFO L226 Difference]: Without dead ends: 106 [2019-01-08 14:14:52,559 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:14:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-08 14:14:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-01-08 14:14:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-08 14:14:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-08 14:14:52,572 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-08 14:14:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:14:52,572 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-08 14:14:52,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:14:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-08 14:14:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:14:52,573 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:14:52,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:14:52,574 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:14:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash 938000, now seen corresponding path program 1 times [2019-01-08 14:14:52,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:14:52,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:52,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:52,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:52,575 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:14:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:52,804 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 13 [2019-01-08 14:14:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:52,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:52,807 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:14:52,807 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:14:52,808 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [33] [2019-01-08 14:14:52,809 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:14:52,809 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:14:52,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:14:52,811 INFO L272 AbstractInterpreter]: Visited 4 different actions 4 times. Never merged. Never widened. Performed 88 root evaluator evaluations with a maximum evaluation depth of 3. Performed 88 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 0 variables. [2019-01-08 14:14:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:52,812 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:14:52,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:52,812 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 [2019-01-08 14:14:52,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:52,821 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:14:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:52,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:14:52,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:14:52,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:14:52,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-08 14:14:52,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:14:52,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,888 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2019-01-08 14:14:52,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-08 14:14:52,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:52,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 108 [2019-01-08 14:14:52,918 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:52,966 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:52,998 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,020 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,037 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,055 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,075 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2019-01-08 14:14:53,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2019-01-08 14:14:53,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 58 [2019-01-08 14:14:53,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 49 [2019-01-08 14:14:53,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2019-01-08 14:14:53,176 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,191 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,201 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,209 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,214 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:53,244 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. [2019-01-08 14:14:53,244 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:82, output treesize:63 [2019-01-08 14:14:53,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:53,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 118 [2019-01-08 14:14:53,299 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:14:53,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 11 dim-0 vars, and 2 xjuncts. [2019-01-08 14:14:53,487 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:122 [2019-01-08 14:14:54,580 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2019-01-08 14:14:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:54,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:14:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:54,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:14:54,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:14:54,612 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:14:54,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:14:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:14:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:14:54,613 INFO L87 Difference]: Start difference. First operand 83 states and 426 transitions. Second operand 6 states. [2019-01-08 14:14:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:14:54,937 INFO L93 Difference]: Finished difference Result 107 states and 456 transitions. [2019-01-08 14:14:54,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:14:54,938 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:14:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:14:54,939 INFO L225 Difference]: With dead ends: 107 [2019-01-08 14:14:54,939 INFO L226 Difference]: Without dead ends: 106 [2019-01-08 14:14:54,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:14:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-01-08 14:14:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2019-01-08 14:14:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-01-08 14:14:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 426 transitions. [2019-01-08 14:14:54,954 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 426 transitions. Word has length 4 [2019-01-08 14:14:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:14:54,954 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 426 transitions. [2019-01-08 14:14:54,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:14:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 426 transitions. [2019-01-08 14:14:54,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:14:54,955 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:14:54,955 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:14:54,955 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:14:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash 29172180, now seen corresponding path program 1 times [2019-01-08 14:14:54,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:14:54,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:54,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:54,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:14:54,956 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:14:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:14:55,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:55,071 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:14:55,071 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:14:55,071 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [33] [2019-01-08 14:14:55,073 INFO L148 AbstractInterpreter]: Using domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-01-08 14:14:55,073 INFO L101 FixpointEngine]: Starting fixpoint engine with domain CompoundDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:14:55,076 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:14:55,076 INFO L272 AbstractInterpreter]: Visited 5 different actions 5 times. Never merged. Never widened. Performed 90 root evaluator evaluations with a maximum evaluation depth of 3. Performed 90 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:14:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:14:55,076 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:14:55,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:14:55,076 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 [2019-01-08 14:14:55,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:14:55,084 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:14:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:14:55,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:14:55,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:14:55,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:14:55,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2019-01-08 14:14:55,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 49 [2019-01-08 14:14:55,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 63 [2019-01-08 14:14:55,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 85 [2019-01-08 14:14:55,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 104 [2019-01-08 14:14:55,194 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,261 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,287 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,308 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,328 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,348 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,362 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 38 [2019-01-08 14:14:55,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2019-01-08 14:14:55,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 35 [2019-01-08 14:14:55,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 45 [2019-01-08 14:14:55,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 33 [2019-01-08 14:14:55,448 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,462 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,468 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,473 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,477 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:14:55,507 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. [2019-01-08 14:14:55,507 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:68, output treesize:59 [2019-01-08 14:14:55,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 108 [2019-01-08 14:14:55,573 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:14:55,738 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2019-01-08 14:14:55,739 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:108 [2019-01-08 14:14:55,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:55,931 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:14:55,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 112 [2019-01-08 14:14:55,933 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:14:56,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:14:56,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 153 [2019-01-08 14:14:56,117 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 8 xjuncts. [2019-01-08 14:14:56,575 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-08 14:14:56,576 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:130, output treesize:244 [2019-01-08 14:15:04,049 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:15:04,051 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:221) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.push(DiffWrapperScript.java:93) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.push(WrapperScript.java:101) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.UndoableWrapperScript.push(UndoableWrapperScript.java:52) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:152) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getTraceCheck(BaseTaipanRefinementStrategy.java:215) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 46 more [2019-01-08 14:15:04,056 INFO L168 Benchmark]: Toolchain (without parser) took 616413.71 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: -735.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-01-08 14:15:04,056 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:15:04,057 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:15:04,057 INFO L168 Benchmark]: Boogie Preprocessor took 24.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:15:04,057 INFO L168 Benchmark]: RCFGBuilder took 552.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-08 14:15:04,057 INFO L168 Benchmark]: TraceAbstraction took 615763.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -756.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-01-08 14:15:04,059 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 68.52 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.97 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 552.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 615763.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -756.7 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:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...