java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf -i ../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-08 14:36:15,521 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-08 14:36:15,523 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-08 14:36:15,535 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-08 14:36:15,567 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/array-bench/reach_32bit_array_oct.epf [2019-01-08 14:36:15,579 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-08 14:36:15,580 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-08 14:36:15,581 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-08 14:36:15,581 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-08 14:36:15,581 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-08 14:36:15,581 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-08 14:36:15,581 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-08 14:36:15,582 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-08 14:36:15,582 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-08 14:36:15,582 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-08 14:36:15,582 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-08 14:36:15,582 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-08 14:36:15,583 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-08 14:36:15,583 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-08 14:36:15,583 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-08 14:36:15,584 INFO L133 SettingsManager]: * Use SBE=true [2019-01-08 14:36:15,584 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-08 14:36:15,584 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-08 14:36:15,584 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-08 14:36:15,584 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-08 14:36:15,585 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-08 14:36:15,585 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-08 14:36:15,585 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-08 14:36:15,585 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-08 14:36:15,585 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-08 14:36:15,586 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-08 14:36:15,586 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-08 14:36:15,586 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-08 14:36:15,586 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-08 14:36:15,587 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-08 14:36:15,587 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in -t:2000 [2019-01-08 14:36:15,587 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-08 14:36:15,587 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-08 14:36:15,587 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-08 14:36:15,588 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-08 14:36:15,588 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-08 14:36:15,588 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:8192 -smt2 -in [2019-01-08 14:36:15,588 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-08 14:36:15,588 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-08 14:36:15,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-08 14:36:15,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-08 14:36:15,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-08 14:36:15,638 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-08 14:36:15,638 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-08 14:36:15,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl [2019-01-08 14:36:15,639 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-7-unlimited.bpl' [2019-01-08 14:36:15,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-08 14:36:15,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-08 14:36:15,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-08 14:36:15,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-08 14:36:15,685 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-08 14:36:15,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-08 14:36:15,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-08 14:36:15,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-08 14:36:15,747 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-08 14:36:15,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/1) ... [2019-01-08 14:36:15,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-08 14:36:15,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-08 14:36:15,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-08 14:36:15,774 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-08 14:36:15,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (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 14:36:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-08 14:36:15,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-08 14:36:16,261 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-08 14:36:16,261 INFO L286 CfgBuilder]: Removed 17 assue(true) statements. [2019-01-08 14:36:16,263 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:36:16 BoogieIcfgContainer [2019-01-08 14:36:16,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-08 14:36:16,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-08 14:36:16,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-08 14:36:16,268 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-08 14:36:16,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 08.01 02:36:15" (1/2) ... [2019-01-08 14:36:16,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2106d42e and model type speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 02:36:16, skipping insertion in model container [2019-01-08 14:36:16,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-7-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 02:36:16" (2/2) ... [2019-01-08 14:36:16,272 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-7-unlimited.bpl [2019-01-08 14:36:16,284 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-08 14:36:16,300 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-01-08 14:36:16,344 INFO L257 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-01-08 14:36:16,399 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-08 14:36:16,400 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-08 14:36:16,400 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-08 14:36:16,400 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-08 14:36:16,400 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-08 14:36:16,401 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-08 14:36:16,401 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-08 14:36:16,401 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-08 14:36:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-01-08 14:36:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-08 14:36:16,429 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:16,430 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-08 14:36:16,433 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2019-01-08 14:36:16,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:16,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:16,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:16,506 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:16,687 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 14:36:16,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:36:16,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:36:16,689 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:36:16,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:36:16,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:36:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:36:16,710 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-01-08 14:36:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:16,913 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-01-08 14:36:16,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:36:16,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-08 14:36:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:16,929 INFO L225 Difference]: With dead ends: 33 [2019-01-08 14:36:16,930 INFO L226 Difference]: Without dead ends: 28 [2019-01-08 14:36:16,933 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 14:36:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-01-08 14:36:16,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2019-01-08 14:36:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-01-08 14:36:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 29 transitions. [2019-01-08 14:36:16,978 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 29 transitions. Word has length 2 [2019-01-08 14:36:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:16,979 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 29 transitions. [2019-01-08 14:36:16,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:36:16,983 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 29 transitions. [2019-01-08 14:36:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:36:16,983 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:16,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:36:16,984 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash 30816, now seen corresponding path program 1 times [2019-01-08 14:36:16,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:16,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:16,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:16,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:16,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:17,089 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 14:36:17,090 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:36:17,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-08 14:36:17,090 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:36:17,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-08 14:36:17,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-08 14:36:17,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-08 14:36:17,093 INFO L87 Difference]: Start difference. First operand 16 states and 29 transitions. Second operand 3 states. [2019-01-08 14:36:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:17,525 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-01-08 14:36:17,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:36:17,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-08 14:36:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:17,527 INFO L225 Difference]: With dead ends: 28 [2019-01-08 14:36:17,528 INFO L226 Difference]: Without dead ends: 27 [2019-01-08 14:36:17,530 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 14:36:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-01-08 14:36:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2019-01-08 14:36:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-08 14:36:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 30 transitions. [2019-01-08 14:36:17,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 30 transitions. Word has length 3 [2019-01-08 14:36:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:17,540 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 30 transitions. [2019-01-08 14:36:17,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-08 14:36:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 30 transitions. [2019-01-08 14:36:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:36:17,541 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:17,541 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:36:17,542 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash 30380, now seen corresponding path program 1 times [2019-01-08 14:36:17,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:17,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:17,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:17,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:17,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:17,749 WARN L181 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2019-01-08 14:36:17,756 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 14:36:17,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:17,756 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:17,757 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:36:17,759 INFO L207 CegarAbsIntRunner]: [0], [18], [31] [2019-01-08 14:36:17,821 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:17,821 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:18,900 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:18,901 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:36:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:18,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:18,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:18,909 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 14:36:18,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:18,923 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:18,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:19,206 WARN L181 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:36:19,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:19,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:19,711 WARN L181 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-01-08 14:36:19,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:19,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:19,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:19,972 WARN L181 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2019-01-08 14:36:19,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:19,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:19,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:19,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:20,215 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2019-01-08 14:36:20,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:20,693 WARN L181 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-08 14:36:20,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:20,797 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-01-08 14:36:20,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:20,801 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:20,872 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:20,930 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:20,974 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,018 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:36:21,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:36:21,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 14:36:21,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:36:21,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:36:21,155 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 14:36:21,273 INFO L303 Elim1Store]: Index analysis took 114 ms [2019-01-08 14:36:21,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:21,276 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,389 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,453 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,538 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,561 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,581 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,598 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,658 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 14:36:21,659 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:21,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:21,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:36:21,754 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:21,890 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 14:36:21,890 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:21,926 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 14:36:21,926 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:21,978 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 14:36:21,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:21,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:36:21,997 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:21,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:36:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:36:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:36:21,999 INFO L87 Difference]: Start difference. First operand 17 states and 30 transitions. Second operand 6 states. [2019-01-08 14:36:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:22,434 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-01-08 14:36:22,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:36:22,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:36:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:22,437 INFO L225 Difference]: With dead ends: 54 [2019-01-08 14:36:22,437 INFO L226 Difference]: Without dead ends: 52 [2019-01-08 14:36:22,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:36:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-08 14:36:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2019-01-08 14:36:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-01-08 14:36:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 41 transitions. [2019-01-08 14:36:22,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 41 transitions. Word has length 3 [2019-01-08 14:36:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:22,444 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 41 transitions. [2019-01-08 14:36:22,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:36:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 41 transitions. [2019-01-08 14:36:22,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:36:22,445 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:22,445 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:36:22,446 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash 30008, now seen corresponding path program 1 times [2019-01-08 14:36:22,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:22,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:22,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:22,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:22,448 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:22,562 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 14:36:22,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:22,562 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:22,563 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:36:22,563 INFO L207 CegarAbsIntRunner]: [0], [6], [31] [2019-01-08 14:36:22,565 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:22,565 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:23,104 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:23,104 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:36:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:23,105 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:23,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:23,105 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 14:36:23,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:23,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:23,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:23,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 14:36:23,191 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 14:36:23,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:36:23,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,215 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 14:36:23,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,327 INFO L303 Elim1Store]: Index analysis took 109 ms [2019-01-08 14:36:23,328 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 14:36:23,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,351 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 14:36:23,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:23,378 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,436 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,475 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,506 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,525 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,543 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,559 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:23,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:23,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:23,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:23,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:23,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:24,004 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-01-08 14:36:24,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:24,034 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,067 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,102 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,132 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,173 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,229 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 14:36:24,230 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:24,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:24,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:36:24,343 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:24,437 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 14:36:24,438 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:24,480 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 14:36:24,481 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:24,489 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 14:36:24,508 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:36:24,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:36:24,508 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:36:24,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:36:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:36:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:36:24,509 INFO L87 Difference]: Start difference. First operand 20 states and 41 transitions. Second operand 4 states. [2019-01-08 14:36:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:24,581 INFO L93 Difference]: Finished difference Result 25 states and 67 transitions. [2019-01-08 14:36:24,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:36:24,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-08 14:36:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:24,583 INFO L225 Difference]: With dead ends: 25 [2019-01-08 14:36:24,583 INFO L226 Difference]: Without dead ends: 24 [2019-01-08 14:36:24,584 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:36:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-01-08 14:36:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-01-08 14:36:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-01-08 14:36:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 66 transitions. [2019-01-08 14:36:24,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 66 transitions. Word has length 3 [2019-01-08 14:36:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:24,592 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 66 transitions. [2019-01-08 14:36:24,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:36:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 66 transitions. [2019-01-08 14:36:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:36:24,593 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:24,593 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:36:24,593 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash 30132, now seen corresponding path program 1 times [2019-01-08 14:36:24,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:24,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:24,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:24,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:24,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:24,677 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 14:36:24,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:24,677 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:24,677 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:36:24,678 INFO L207 CegarAbsIntRunner]: [0], [10], [31] [2019-01-08 14:36:24,680 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:24,680 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:25,037 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:25,037 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:36:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:25,038 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:25,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:25,038 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 14:36:25,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:25,058 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:25,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:25,110 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 14:36:25,115 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:36:25,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,124 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:36:25,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,134 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 14:36:25,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,148 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 14:36:25,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:36:25,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:25,183 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,232 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,267 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,293 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,314 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,334 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,351 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:25,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:25,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:25,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:25,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:25,684 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,726 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,762 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,793 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,831 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,889 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 14:36:25,889 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:25,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:25,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:36:25,941 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:25,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:36:25,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:26,165 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-08 14:36:26,166 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 14:36:26,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:26,222 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 14:36:26,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:26,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:36:26,243 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:26,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:36:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:36:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:36:26,244 INFO L87 Difference]: Start difference. First operand 23 states and 66 transitions. Second operand 6 states. [2019-01-08 14:36:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:26,543 INFO L93 Difference]: Finished difference Result 57 states and 111 transitions. [2019-01-08 14:36:26,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:36:26,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:36:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:26,546 INFO L225 Difference]: With dead ends: 57 [2019-01-08 14:36:26,546 INFO L226 Difference]: Without dead ends: 56 [2019-01-08 14:36:26,547 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:36:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-01-08 14:36:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2019-01-08 14:36:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-08 14:36:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 82 transitions. [2019-01-08 14:36:26,554 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 82 transitions. Word has length 3 [2019-01-08 14:36:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:26,554 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 82 transitions. [2019-01-08 14:36:26,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:36:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 82 transitions. [2019-01-08 14:36:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-08 14:36:26,555 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:26,555 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-08 14:36:26,555 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:26,555 INFO L82 PathProgramCache]: Analyzing trace with hash 30628, now seen corresponding path program 1 times [2019-01-08 14:36:26,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:26,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:26,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:26,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:26,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:26,626 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 14:36:26,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:26,627 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:26,627 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-08 14:36:26,627 INFO L207 CegarAbsIntRunner]: [0], [26], [31] [2019-01-08 14:36:26,630 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:26,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:26,936 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:26,937 INFO L272 AbstractInterpreter]: Visited 3 different actions 5 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:36:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:26,937 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:26,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:26,938 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 14:36:26,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:26,950 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:26,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:27,060 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 14:36:27,065 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 14:36:27,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,074 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 14:36:27,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,087 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 14:36:27,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,131 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 14:36:27,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,144 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 14:36:27,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:27,159 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,204 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,238 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,264 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,334 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,350 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,365 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:27,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:27,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:27,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:27,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:27,618 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,645 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,671 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,700 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,731 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,788 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 14:36:27,788 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:27,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:27,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:36:27,850 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:27,923 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 14:36:27,923 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:27,945 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 14:36:27,946 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:27,973 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 14:36:27,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:27,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:36:27,994 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:27,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:36:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:36:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:36:27,995 INFO L87 Difference]: Start difference. First operand 25 states and 82 transitions. Second operand 6 states. [2019-01-08 14:36:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:28,357 INFO L93 Difference]: Finished difference Result 59 states and 127 transitions. [2019-01-08 14:36:28,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:36:28,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-08 14:36:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:28,359 INFO L225 Difference]: With dead ends: 59 [2019-01-08 14:36:28,359 INFO L226 Difference]: Without dead ends: 57 [2019-01-08 14:36:28,360 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:36:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-01-08 14:36:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2019-01-08 14:36:28,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-01-08 14:36:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 101 transitions. [2019-01-08 14:36:28,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 101 transitions. Word has length 3 [2019-01-08 14:36:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:28,368 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 101 transitions. [2019-01-08 14:36:28,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:36:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 101 transitions. [2019-01-08 14:36:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:28,369 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:28,370 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:28,370 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 955362, now seen corresponding path program 1 times [2019-01-08 14:36:28,370 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:28,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:28,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:28,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:28,372 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:28,553 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 14:36:28,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:36:28,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-08 14:36:28,554 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:36:28,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:36:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:36:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-08 14:36:28,554 INFO L87 Difference]: Start difference. First operand 29 states and 101 transitions. Second operand 4 states. [2019-01-08 14:36:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:28,664 INFO L93 Difference]: Finished difference Result 37 states and 114 transitions. [2019-01-08 14:36:28,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:36:28,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-08 14:36:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:28,665 INFO L225 Difference]: With dead ends: 37 [2019-01-08 14:36:28,666 INFO L226 Difference]: Without dead ends: 36 [2019-01-08 14:36:28,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-08 14:36:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-01-08 14:36:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-01-08 14:36:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-08 14:36:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 111 transitions. [2019-01-08 14:36:28,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 111 transitions. Word has length 4 [2019-01-08 14:36:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:28,675 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 111 transitions. [2019-01-08 14:36:28,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:36:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 111 transitions. [2019-01-08 14:36:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:28,676 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:28,676 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:28,676 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:28,677 INFO L82 PathProgramCache]: Analyzing trace with hash 941844, now seen corresponding path program 1 times [2019-01-08 14:36:28,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:28,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:28,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:28,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:28,678 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:28,781 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 14:36:28,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:28,781 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:28,781 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:28,781 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [33] [2019-01-08 14:36:28,783 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:28,783 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:29,142 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:29,143 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:36:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:29,143 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:29,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:29,143 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 14:36:29,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:29,158 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:29,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:29,373 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:36:29,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:29,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:29,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,581 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:29,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:29,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:29,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:29,718 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:29,744 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:29,769 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:29,809 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:29,837 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:29,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:36:29,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:36:29,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:36:29,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:36:29,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:36:29,911 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 14:36:29,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:29,945 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:29,988 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,018 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,078 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,096 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,112 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,127 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,270 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 14:36:30,271 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:30,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:30,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:36:30,351 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:30,399 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 14:36:30,400 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:30,442 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 14:36:30,442 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:30,506 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 14:36:30,525 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:36:30,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:36:30,525 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:36:30,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:36:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:36:30,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:36:30,526 INFO L87 Difference]: Start difference. First operand 32 states and 111 transitions. Second operand 4 states. [2019-01-08 14:36:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:30,607 INFO L93 Difference]: Finished difference Result 36 states and 122 transitions. [2019-01-08 14:36:30,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:36:30,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-08 14:36:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:30,609 INFO L225 Difference]: With dead ends: 36 [2019-01-08 14:36:30,609 INFO L226 Difference]: Without dead ends: 35 [2019-01-08 14:36:30,610 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:36:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-01-08 14:36:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-01-08 14:36:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-08 14:36:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 121 transitions. [2019-01-08 14:36:30,617 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 121 transitions. Word has length 4 [2019-01-08 14:36:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:30,617 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 121 transitions. [2019-01-08 14:36:30,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:36:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 121 transitions. [2019-01-08 14:36:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:30,618 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:30,618 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:30,618 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:30,619 INFO L82 PathProgramCache]: Analyzing trace with hash 941532, now seen corresponding path program 1 times [2019-01-08 14:36:30,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:30,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:30,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:30,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:30,620 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:30,790 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 14:36:30,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:30,791 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:30,791 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:30,791 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [31] [2019-01-08 14:36:30,792 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:30,792 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:31,197 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:31,197 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:31,198 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:31,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:31,198 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 14:36:31,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:31,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:31,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:31,424 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:36:31,433 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 14:36:31,437 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 14:36:31,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:36:31,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,453 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 14:36:31,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,505 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 14:36:31,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:36:31,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:31,531 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,572 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,604 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,627 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,649 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,664 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,678 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:31,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:31,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:31,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:31,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:31,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:31,939 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:31,976 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:32,001 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:32,028 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:32,053 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:32,103 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 14:36:32,104 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:32,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:36:32,155 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:32,438 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:36:32,438 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:32,655 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-08 14:36:32,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:32,863 INFO L303 Elim1Store]: Index analysis took 203 ms [2019-01-08 14:36:32,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:36:32,865 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:32,997 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 14:36:32,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:36:33,022 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 14:36:33,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:33,049 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 14:36:33,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:33,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:36:33,070 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:33,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:36:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:36:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:36:33,071 INFO L87 Difference]: Start difference. First operand 34 states and 121 transitions. Second operand 8 states. [2019-01-08 14:36:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:33,617 INFO L93 Difference]: Finished difference Result 79 states and 193 transitions. [2019-01-08 14:36:33,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:36:33,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:36:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:33,619 INFO L225 Difference]: With dead ends: 79 [2019-01-08 14:36:33,619 INFO L226 Difference]: Without dead ends: 77 [2019-01-08 14:36:33,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:36:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-01-08 14:36:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2019-01-08 14:36:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-08 14:36:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2019-01-08 14:36:33,629 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2019-01-08 14:36:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:33,629 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2019-01-08 14:36:33,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:36:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2019-01-08 14:36:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:33,630 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:33,630 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:33,630 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:33,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash 941160, now seen corresponding path program 1 times [2019-01-08 14:36:33,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:33,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:33,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:33,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:33,632 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:33,795 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-08 14:36:33,810 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 14:36:33,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:33,810 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:33,810 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:33,811 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [31] [2019-01-08 14:36:33,812 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:33,812 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:34,283 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:34,283 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:34,284 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:34,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:34,284 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 14:36:34,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:34,293 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:34,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:34,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:36:34,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:36:34,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,344 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 14:36:34,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,359 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 14:36:34,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,390 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 14:36:34,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,405 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 14:36:34,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:34,418 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,459 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,493 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,518 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,540 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,554 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,571 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:34,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:34,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:34,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:34,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:34,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:34,829 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,854 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,877 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,902 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,927 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:34,974 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 14:36:34,974 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:35,299 WARN L181 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-08 14:36:35,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:36:35,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:35,406 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:36:35,406 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:35,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:35,433 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:36:35,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:36:35,435 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:35,478 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 14:36:35,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:36:35,498 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 14:36:35,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:35,520 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 14:36:35,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:35,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:36:35,539 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:35,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:36:35,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:36:35,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:36:35,540 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2019-01-08 14:36:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:36,040 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2019-01-08 14:36:36,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:36:36,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:36:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:36,041 INFO L225 Difference]: With dead ends: 74 [2019-01-08 14:36:36,042 INFO L226 Difference]: Without dead ends: 73 [2019-01-08 14:36:36,042 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:36:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-01-08 14:36:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2019-01-08 14:36:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-08 14:36:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 150 transitions. [2019-01-08 14:36:36,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 150 transitions. Word has length 4 [2019-01-08 14:36:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:36,052 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 150 transitions. [2019-01-08 14:36:36,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:36:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 150 transitions. [2019-01-08 14:36:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:36,053 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:36,053 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:36,053 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:36,053 INFO L82 PathProgramCache]: Analyzing trace with hash 941656, now seen corresponding path program 1 times [2019-01-08 14:36:36,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:36,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:36,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:36,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:36,054 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:36,232 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 14:36:36,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:36,232 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:36,233 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:36,233 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [31] [2019-01-08 14:36:36,234 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:36,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:36,572 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:36,572 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:36,573 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:36,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:36,573 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 14:36:36,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:36,589 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:36,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:36,804 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:36:36,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:36,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:36,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:36,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:37,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:37,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:37,125 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,151 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,219 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,305 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,333 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:36:37,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:36:37,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:36:37,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:36:37,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:36:37,392 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 14:36:37,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:37,404 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,443 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,474 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,498 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,517 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,531 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,546 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,711 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 14:36:37,711 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:37,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:36:37,765 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:37,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:36:37,829 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:37,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:37,952 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:36:37,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:36:37,954 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:38,001 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 14:36:38,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:36:38,020 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 14:36:38,021 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:38,042 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 14:36:38,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:38,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:36:38,062 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:38,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:36:38,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:36:38,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:36:38,063 INFO L87 Difference]: Start difference. First operand 41 states and 150 transitions. Second operand 8 states. [2019-01-08 14:36:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:38,596 INFO L93 Difference]: Finished difference Result 74 states and 192 transitions. [2019-01-08 14:36:38,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:36:38,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:36:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:38,598 INFO L225 Difference]: With dead ends: 74 [2019-01-08 14:36:38,598 INFO L226 Difference]: Without dead ends: 72 [2019-01-08 14:36:38,598 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:36:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-01-08 14:36:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2019-01-08 14:36:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-01-08 14:36:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 149 transitions. [2019-01-08 14:36:38,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 149 transitions. Word has length 4 [2019-01-08 14:36:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:38,608 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 149 transitions. [2019-01-08 14:36:38,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:36:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 149 transitions. [2019-01-08 14:36:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:38,609 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:38,609 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:38,610 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash 941718, now seen corresponding path program 1 times [2019-01-08 14:36:38,610 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:38,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:38,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:38,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:38,611 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:38,715 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 14:36:38,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:38,716 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:38,716 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:38,716 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [31] [2019-01-08 14:36:38,718 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:38,719 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:39,171 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:39,171 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:39,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:39,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:39,172 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 14:36:39,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:39,186 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:39,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:39,354 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:36:39,357 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 14:36:39,367 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 14:36:39,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:36:39,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,381 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 14:36:39,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,390 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 14:36:39,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,425 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 14:36:39,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:39,437 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,476 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,512 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,537 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,556 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,574 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,590 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:39,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:39,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:39,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:39,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:39,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:39,854 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,879 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,905 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,932 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:39,959 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:40,023 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 14:36:40,024 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:40,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:36:40,073 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:36:40,227 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 14:36:40,227 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2019-01-08 14:36:40,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,273 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:36:40,275 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 83 treesize of output 97 [2019-01-08 14:36:40,276 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:40,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:40,486 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 10 case distinctions, treesize of input 88 treesize of output 142 [2019-01-08 14:36:40,499 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 32 xjuncts. [2019-01-08 14:36:41,277 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2019-01-08 14:36:41,277 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2019-01-08 14:36:42,009 WARN L181 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2019-01-08 14:36:42,010 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 14:36:42,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:42,040 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 14:36:42,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:42,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:36:42,060 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:42,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:36:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:36:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:36:42,061 INFO L87 Difference]: Start difference. First operand 40 states and 149 transitions. Second operand 8 states. [2019-01-08 14:36:42,725 WARN L181 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2019-01-08 14:36:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:51,140 INFO L93 Difference]: Finished difference Result 79 states and 233 transitions. [2019-01-08 14:36:51,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:36:51,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:36:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:51,142 INFO L225 Difference]: With dead ends: 79 [2019-01-08 14:36:51,142 INFO L226 Difference]: Without dead ends: 71 [2019-01-08 14:36:51,143 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:36:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-01-08 14:36:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2019-01-08 14:36:51,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-08 14:36:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 177 transitions. [2019-01-08 14:36:51,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 177 transitions. Word has length 4 [2019-01-08 14:36:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:51,155 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 177 transitions. [2019-01-08 14:36:51,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:36:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 177 transitions. [2019-01-08 14:36:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:51,156 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:51,156 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:51,156 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 930312, now seen corresponding path program 1 times [2019-01-08 14:36:51,157 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:51,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:51,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:51,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:51,158 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:36:51,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-08 14:36:51,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-08 14:36:51,244 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:36:51,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:36:51,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:36:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-08 14:36:51,244 INFO L87 Difference]: Start difference. First operand 41 states and 177 transitions. Second operand 4 states. [2019-01-08 14:36:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:51,332 INFO L93 Difference]: Finished difference Result 53 states and 195 transitions. [2019-01-08 14:36:51,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-08 14:36:51,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-08 14:36:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:51,333 INFO L225 Difference]: With dead ends: 53 [2019-01-08 14:36:51,333 INFO L226 Difference]: Without dead ends: 52 [2019-01-08 14:36:51,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-01-08 14:36:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-01-08 14:36:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2019-01-08 14:36:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-08 14:36:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 186 transitions. [2019-01-08 14:36:51,343 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 186 transitions. Word has length 4 [2019-01-08 14:36:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:51,344 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 186 transitions. [2019-01-08 14:36:51,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:36:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 186 transitions. [2019-01-08 14:36:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:51,344 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:51,344 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:51,345 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash 929876, now seen corresponding path program 1 times [2019-01-08 14:36:51,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:51,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:51,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:51,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:51,346 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:51,532 WARN L181 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2019-01-08 14:36:51,542 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 14:36:51,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:51,542 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:51,542 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:51,543 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [31] [2019-01-08 14:36:51,545 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:51,545 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:51,948 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:51,949 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:51,949 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:51,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:51,949 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 14:36:51,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:51,965 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:51,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:52,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:52,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:52,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:52,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:52,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:52,272 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,350 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,376 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,403 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,431 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:36:52,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:36:52,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:36:52,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:36:52,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:36:52,485 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 14:36:52,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:52,494 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,576 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,607 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,651 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,670 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,686 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,701 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,755 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 14:36:52,755 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:52,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:52,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:36:52,808 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:52,977 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:36:52,978 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:53,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:53,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:36:53,012 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:53,065 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 14:36:53,066 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:36:53,105 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 14:36:53,105 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:53,173 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 14:36:53,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:53,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:36:53,194 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:53,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:36:53,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:36:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:36:53,195 INFO L87 Difference]: Start difference. First operand 43 states and 186 transitions. Second operand 8 states. [2019-01-08 14:36:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:53,815 INFO L93 Difference]: Finished difference Result 87 states and 278 transitions. [2019-01-08 14:36:53,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:36:53,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:36:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:53,817 INFO L225 Difference]: With dead ends: 87 [2019-01-08 14:36:53,818 INFO L226 Difference]: Without dead ends: 85 [2019-01-08 14:36:53,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:36:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-01-08 14:36:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 41. [2019-01-08 14:36:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-01-08 14:36:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 149 transitions. [2019-01-08 14:36:53,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 149 transitions. Word has length 4 [2019-01-08 14:36:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:53,831 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 149 transitions. [2019-01-08 14:36:53,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:36:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 149 transitions. [2019-01-08 14:36:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:53,832 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:53,832 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:53,832 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash 945688, now seen corresponding path program 1 times [2019-01-08 14:36:53,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:53,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:53,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:53,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:53,834 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:53,902 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 14:36:53,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:53,903 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:53,903 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:53,903 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [33] [2019-01-08 14:36:53,905 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:53,905 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:54,191 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:54,191 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:36:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:54,192 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:54,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:54,192 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 14:36:54,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:54,203 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:54,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:54,241 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 14:36:54,244 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 14:36:54,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,250 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 14:36:54,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:36:54,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,281 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 14:36:54,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,323 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 14:36:54,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:54,409 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,451 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,485 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,509 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,568 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,583 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,599 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:54,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:54,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:54,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:54,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:54,858 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:54,859 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,885 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,911 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,937 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:54,964 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:55,014 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 14:36:55,015 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:55,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:55,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:36:55,072 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:55,117 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 14:36:55,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:55,133 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:55,145 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 14:36:55,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:55,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:36:55,165 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:55,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:36:55,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:36:55,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:36:55,166 INFO L87 Difference]: Start difference. First operand 41 states and 149 transitions. Second operand 6 states. [2019-01-08 14:36:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:55,362 INFO L93 Difference]: Finished difference Result 64 states and 185 transitions. [2019-01-08 14:36:55,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:36:55,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:36:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:55,364 INFO L225 Difference]: With dead ends: 64 [2019-01-08 14:36:55,364 INFO L226 Difference]: Without dead ends: 63 [2019-01-08 14:36:55,364 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:36:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-01-08 14:36:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-01-08 14:36:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-01-08 14:36:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 157 transitions. [2019-01-08 14:36:55,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 157 transitions. Word has length 4 [2019-01-08 14:36:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:55,376 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 157 transitions. [2019-01-08 14:36:55,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:36:55,376 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 157 transitions. [2019-01-08 14:36:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:55,376 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:55,377 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:55,377 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash 945004, now seen corresponding path program 1 times [2019-01-08 14:36:55,377 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:55,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:55,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:55,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:55,378 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:55,527 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 14:36:55,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:55,527 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:55,527 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:55,527 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [31] [2019-01-08 14:36:55,528 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:55,528 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:55,859 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:55,859 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:55,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:55,859 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:55,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:55,860 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 14:36:55,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:55,876 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:55,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:55,995 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 14:36:55,999 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 14:36:56,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,004 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 14:36:56,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,010 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 14:36:56,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,019 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 14:36:56,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,030 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 14:36:56,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:56,040 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,082 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,114 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,137 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,157 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,173 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,188 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:56,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:56,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:56,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:56,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:56,532 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,570 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,600 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,633 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,668 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,718 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 14:36:56,718 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:36:56,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:36:56,794 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,843 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:36:56,844 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:36:56,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:56,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:36:56,885 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:56,933 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 14:36:56,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:36:56,955 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 14:36:56,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:36:56,971 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 14:36:56,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:36:56,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:36:56,991 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:36:56,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:36:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:36:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:36:56,992 INFO L87 Difference]: Start difference. First operand 42 states and 157 transitions. Second operand 8 states. [2019-01-08 14:36:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:36:57,993 INFO L93 Difference]: Finished difference Result 98 states and 268 transitions. [2019-01-08 14:36:57,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:36:57,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:36:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:36:57,995 INFO L225 Difference]: With dead ends: 98 [2019-01-08 14:36:57,995 INFO L226 Difference]: Without dead ends: 97 [2019-01-08 14:36:57,996 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:36:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-01-08 14:36:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 47. [2019-01-08 14:36:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-01-08 14:36:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 197 transitions. [2019-01-08 14:36:58,010 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 197 transitions. Word has length 4 [2019-01-08 14:36:58,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:36:58,010 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 197 transitions. [2019-01-08 14:36:58,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:36:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 197 transitions. [2019-01-08 14:36:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:36:58,011 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:36:58,011 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:36:58,012 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:36:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:58,012 INFO L82 PathProgramCache]: Analyzing trace with hash 945500, now seen corresponding path program 1 times [2019-01-08 14:36:58,012 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:36:58,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:58,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:58,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:36:58,013 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:36:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:58,410 WARN L181 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2019-01-08 14:36:58,569 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2019-01-08 14:36:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:36:58,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:58,672 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:36:58,672 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:36:58,672 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [31] [2019-01-08 14:36:58,674 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:36:58,674 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:36:58,992 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:36:58,994 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:36:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:36:58,995 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:36:58,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:36:58,995 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:36:59,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:36:59,028 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:36:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:36:59,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:36:59,115 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 14:36:59,119 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 14:36:59,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,125 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 14:36:59,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,131 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 14:36:59,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,143 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 14:36:59,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,156 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 14:36:59,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:36:59,170 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,211 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,244 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,271 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,290 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,308 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,324 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:36:59,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:36:59,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:36:59,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:36:59,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:36:59,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:36:59,573 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,600 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,626 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,653 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,678 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:36:59,728 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 14:36:59,729 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:00,145 WARN L181 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-08 14:37:00,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:00,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:37:00,189 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:00,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:00,728 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:00,943 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-01-08 14:37:00,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:01,151 INFO L303 Elim1Store]: Index analysis took 204 ms [2019-01-08 14:37:01,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:37:01,155 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:01,600 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 14:37:01,602 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:37:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:01,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:01,701 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 14:37:01,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:01,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:37:01,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:01,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:01,721 INFO L87 Difference]: Start difference. First operand 47 states and 197 transitions. Second operand 8 states. [2019-01-08 14:37:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:02,154 INFO L93 Difference]: Finished difference Result 91 states and 282 transitions. [2019-01-08 14:37:02,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:37:02,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:37:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:02,156 INFO L225 Difference]: With dead ends: 91 [2019-01-08 14:37:02,156 INFO L226 Difference]: Without dead ends: 89 [2019-01-08 14:37:02,157 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-08 14:37:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2019-01-08 14:37:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-01-08 14:37:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 243 transitions. [2019-01-08 14:37:02,178 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 243 transitions. Word has length 4 [2019-01-08 14:37:02,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:02,178 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 243 transitions. [2019-01-08 14:37:02,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:02,178 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 243 transitions. [2019-01-08 14:37:02,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:37:02,179 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:02,179 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:37:02,180 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:02,180 INFO L82 PathProgramCache]: Analyzing trace with hash 933968, now seen corresponding path program 1 times [2019-01-08 14:37:02,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:02,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:02,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:02,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:02,181 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:02,278 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 14:37:02,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:02,279 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:02,279 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:37:02,279 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [31] [2019-01-08 14:37:02,280 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:02,280 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:02,543 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:02,543 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:37:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:02,543 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:02,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:02,543 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 14:37:02,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:02,551 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:02,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:02,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:02,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:02,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:02,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:02,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:02,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:02,833 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:02,862 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:02,889 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:02,917 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:02,947 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:02,986 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 14:37:02,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:37:02,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:02,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:37:03,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:03,005 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 14:37:03,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:03,015 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,053 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,083 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,106 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,124 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,140 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,154 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,203 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 14:37:03,203 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:03,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:37:03,282 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,328 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:03,329 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:03,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:03,390 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:03,391 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-08 14:37:03,392 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:03,442 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 14:37:03,442 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:61 [2019-01-08 14:37:03,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:03,459 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:03,481 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 14:37:03,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:03,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:37:03,499 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:03,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:03,500 INFO L87 Difference]: Start difference. First operand 56 states and 243 transitions. Second operand 8 states. [2019-01-08 14:37:03,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:03,922 INFO L93 Difference]: Finished difference Result 92 states and 291 transitions. [2019-01-08 14:37:03,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:37:03,922 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:37:03,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:03,924 INFO L225 Difference]: With dead ends: 92 [2019-01-08 14:37:03,924 INFO L226 Difference]: Without dead ends: 90 [2019-01-08 14:37:03,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-01-08 14:37:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2019-01-08 14:37:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-08 14:37:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 254 transitions. [2019-01-08 14:37:03,941 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 254 transitions. Word has length 4 [2019-01-08 14:37:03,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:03,941 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 254 transitions. [2019-01-08 14:37:03,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 254 transitions. [2019-01-08 14:37:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:37:03,942 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:03,942 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:37:03,943 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash 949406, now seen corresponding path program 1 times [2019-01-08 14:37:03,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:03,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:03,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:03,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:03,944 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:04,103 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 14:37:04,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:04,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:04,104 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:37:04,104 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [31] [2019-01-08 14:37:04,105 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:04,105 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:04,527 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:04,527 INFO L272 AbstractInterpreter]: Visited 4 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:37:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:04,528 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:04,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:04,528 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 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 14:37:04,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:04,543 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:04,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:04,612 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 14:37:04,617 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 14:37:04,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,626 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 14:37:04,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:37:04,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:37:04,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,663 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 14:37:04,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:04,676 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,718 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,751 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,778 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,817 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,834 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,849 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:04,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:04,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:04,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:05,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:05,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:05,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:05,182 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,212 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,242 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,271 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,302 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:05,359 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 14:37:05,360 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:05,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-08 14:37:05,444 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:37:05,635 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 14:37:05,649 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:150 [2019-01-08 14:37:05,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:05,813 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 10 case distinctions, treesize of input 88 treesize of output 142 [2019-01-08 14:37:05,823 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-08 14:37:06,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:06,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:06,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:06,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:06,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:06,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:06,831 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:06,832 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 83 treesize of output 97 [2019-01-08 14:37:06,833 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:07,099 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2019-01-08 14:37:07,100 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:172, output treesize:455 [2019-01-08 14:37:16,462 WARN L181 SmtUtils]: Spent 9.18 s on a formula simplification. DAG size of input: 264 DAG size of output: 121 [2019-01-08 14:37:16,464 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 14:37:16,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:16,497 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 14:37:16,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:16,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:37:16,518 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:16,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:16,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:37:16,519 INFO L87 Difference]: Start difference. First operand 59 states and 254 transitions. Second operand 8 states. [2019-01-08 14:37:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:20,843 INFO L93 Difference]: Finished difference Result 101 states and 344 transitions. [2019-01-08 14:37:20,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:37:20,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:37:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:20,846 INFO L225 Difference]: With dead ends: 101 [2019-01-08 14:37:20,846 INFO L226 Difference]: Without dead ends: 100 [2019-01-08 14:37:20,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-01-08 14:37:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 63. [2019-01-08 14:37:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-01-08 14:37:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 286 transitions. [2019-01-08 14:37:20,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 286 transitions. Word has length 4 [2019-01-08 14:37:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:20,865 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 286 transitions. [2019-01-08 14:37:20,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 286 transitions. [2019-01-08 14:37:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:37:20,866 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:20,866 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:37:20,866 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash 951454, now seen corresponding path program 1 times [2019-01-08 14:37:20,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:20,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:20,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:20,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:20,868 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:20,928 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 14:37:20,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:20,928 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:20,928 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:37:20,929 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [33] [2019-01-08 14:37:20,930 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:20,930 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:22,502 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:22,502 INFO L272 AbstractInterpreter]: Visited 4 different actions 12 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:37:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:22,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:22,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:22,503 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 14:37:22,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:22,513 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:22,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:22,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,564 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 91 treesize of output 91 [2019-01-08 14:37:22,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,618 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 78 treesize of output 84 [2019-01-08 14:37:22,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:37:22,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:37:22,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:37:22,939 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-08 14:37:22,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:22,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:37:22,960 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,009 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,059 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,105 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,154 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,204 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:23,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:37:23,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:23,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 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 14:37:23,279 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:23,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:37:23,286 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 14:37:23,287 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,355 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,386 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,410 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,426 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,442 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,457 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,526 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 14:37:23,526 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:118, output treesize:120 [2019-01-08 14:37:23,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:23,548 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 14:37:23,549 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:23,614 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 14:37:23,614 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-08 14:37:23,660 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 14:37:23,660 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:23,670 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 14:37:23,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:23,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:37:23,688 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:23,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:37:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:37:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:37:23,689 INFO L87 Difference]: Start difference. First operand 63 states and 286 transitions. Second operand 6 states. [2019-01-08 14:37:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:23,922 INFO L93 Difference]: Finished difference Result 86 states and 322 transitions. [2019-01-08 14:37:23,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:37:23,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:37:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:23,924 INFO L225 Difference]: With dead ends: 86 [2019-01-08 14:37:23,924 INFO L226 Difference]: Without dead ends: 85 [2019-01-08 14:37:23,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:37:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-01-08 14:37:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2019-01-08 14:37:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-01-08 14:37:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 294 transitions. [2019-01-08 14:37:23,938 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 294 transitions. Word has length 4 [2019-01-08 14:37:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:23,938 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 294 transitions. [2019-01-08 14:37:23,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:37:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 294 transitions. [2019-01-08 14:37:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:37:23,939 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:23,939 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:37:23,940 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash 951266, now seen corresponding path program 2 times [2019-01-08 14:37:23,940 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:23,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:23,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:23,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:23,941 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:24,094 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 14:37:24,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:24,094 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:24,094 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:24,095 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:24,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:24,095 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 14:37:24,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:37:24,105 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:37:24,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-08 14:37:24,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:37:24,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:24,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 14:37:24,152 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 14:37:24,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:37:24,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,168 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 14:37:24,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,174 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 14:37:24,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,185 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 14:37:24,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,200 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 14:37:24,200 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,258 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,289 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,314 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,336 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,436 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,453 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:37:24,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:37:24,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:37:24,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:37:24,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,794 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:37:24,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:24,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:37:24,899 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,942 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:24,982 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:25,023 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:25,061 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:25,102 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:25,171 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 14:37:25,172 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:37:25,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,204 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 14:37:25,204 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:25,286 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 14:37:25,287 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:37:25,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:25,331 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 14:37:25,331 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:25,399 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 14:37:25,400 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-08 14:37:25,420 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 14:37:25,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:25,437 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 14:37:25,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:25,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:37:25,457 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:25,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:37:25,458 INFO L87 Difference]: Start difference. First operand 64 states and 294 transitions. Second operand 8 states. [2019-01-08 14:37:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:26,141 INFO L93 Difference]: Finished difference Result 119 states and 384 transitions. [2019-01-08 14:37:26,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:37:26,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-08 14:37:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:26,144 INFO L225 Difference]: With dead ends: 119 [2019-01-08 14:37:26,144 INFO L226 Difference]: Without dead ends: 115 [2019-01-08 14:37:26,144 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-01-08 14:37:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2019-01-08 14:37:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-01-08 14:37:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 286 transitions. [2019-01-08 14:37:26,166 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 286 transitions. Word has length 4 [2019-01-08 14:37:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:26,167 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 286 transitions. [2019-01-08 14:37:26,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 286 transitions. [2019-01-08 14:37:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-08 14:37:26,167 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:26,168 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-08 14:37:26,168 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:26,168 INFO L82 PathProgramCache]: Analyzing trace with hash 938000, now seen corresponding path program 1 times [2019-01-08 14:37:26,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:26,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:26,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:37:26,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:26,169 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:26,337 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 14:37:26,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:26,338 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:26,338 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-08 14:37:26,338 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [33] [2019-01-08 14:37:26,340 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:26,340 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:26,575 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:26,576 INFO L272 AbstractInterpreter]: Visited 4 different actions 6 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:37:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:26,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:26,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:26,576 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 14:37:26,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:26,587 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:26,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:26,634 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 14:37:26,653 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 14:37:26,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,669 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 14:37:26,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,683 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 14:37:26,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,696 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 14:37:26,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,711 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 14:37:26,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:26,728 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,793 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,827 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,853 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,875 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,891 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,906 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:26,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:26,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:26,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:27,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:27,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:27,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:27,247 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,280 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,312 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,337 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,363 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,411 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 14:37:27,411 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:27,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:27,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:37:27,445 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:27,489 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 14:37:27,489 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:27,527 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 14:37:27,528 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:27,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:27,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:37:27,560 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:27,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:37:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:37:27,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:37:27,560 INFO L87 Difference]: Start difference. First operand 67 states and 286 transitions. Second operand 6 states. [2019-01-08 14:37:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:27,990 INFO L93 Difference]: Finished difference Result 90 states and 322 transitions. [2019-01-08 14:37:27,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:37:27,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-08 14:37:27,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:27,994 INFO L225 Difference]: With dead ends: 90 [2019-01-08 14:37:27,994 INFO L226 Difference]: Without dead ends: 89 [2019-01-08 14:37:27,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:37:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-01-08 14:37:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2019-01-08 14:37:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-01-08 14:37:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 294 transitions. [2019-01-08 14:37:28,012 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 294 transitions. Word has length 4 [2019-01-08 14:37:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:28,013 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 294 transitions. [2019-01-08 14:37:28,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:37:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 294 transitions. [2019-01-08 14:37:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:28,013 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:28,013 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:28,014 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:28,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:28,014 INFO L82 PathProgramCache]: Analyzing trace with hash 29197230, now seen corresponding path program 1 times [2019-01-08 14:37:28,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:28,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:28,014 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:28,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:28,015 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:28,186 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2019-01-08 14:37:28,230 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 14:37:28,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:28,230 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:28,231 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:28,231 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [34], [35] [2019-01-08 14:37:28,232 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:28,232 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:28,482 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:28,482 INFO L272 AbstractInterpreter]: Visited 5 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:37:28,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:28,483 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:28,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:28,483 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 14:37:28,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:28,501 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:28,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:28,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,550 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 57 treesize of output 63 [2019-01-08 14:37:28,556 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 59 treesize of output 48 [2019-01-08 14:37:28,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,584 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 41 treesize of output 62 [2019-01-08 14:37:28,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:37:28,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:28,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:37:28,704 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,728 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,749 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,772 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,798 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:28,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:37:28,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 14:37:28,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 14:37:28,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 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 14:37:28,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:37:28,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:37:28,868 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,902 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,928 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,947 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,960 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,976 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:28,990 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:29,035 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 14:37:29,035 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:84, output treesize:88 [2019-01-08 14:37:29,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 83 [2019-01-08 14:37:29,077 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:29,115 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:29,116 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:63 [2019-01-08 14:37:29,139 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 14:37:29,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:29,149 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 14:37:29,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:29,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2019-01-08 14:37:29,169 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:29,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-08 14:37:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-08 14:37:29,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:37:29,170 INFO L87 Difference]: Start difference. First operand 68 states and 294 transitions. Second operand 7 states. [2019-01-08 14:37:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:29,477 INFO L93 Difference]: Finished difference Result 77 states and 308 transitions. [2019-01-08 14:37:29,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:37:29,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-01-08 14:37:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:29,479 INFO L225 Difference]: With dead ends: 77 [2019-01-08 14:37:29,479 INFO L226 Difference]: Without dead ends: 76 [2019-01-08 14:37:29,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:37:29,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-01-08 14:37:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2019-01-08 14:37:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-01-08 14:37:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 301 transitions. [2019-01-08 14:37:29,494 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 301 transitions. Word has length 5 [2019-01-08 14:37:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:29,495 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 301 transitions. [2019-01-08 14:37:29,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-08 14:37:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 301 transitions. [2019-01-08 14:37:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:29,495 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:29,495 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:29,495 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash 29172180, now seen corresponding path program 1 times [2019-01-08 14:37:29,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:29,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:29,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:29,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:29,496 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:37:29,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:29,548 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:29,548 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:29,548 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [33] [2019-01-08 14:37:29,551 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:29,551 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:29,828 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:29,828 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:37:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:29,828 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:29,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:29,828 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 14:37:29,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:29,836 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:29,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:29,875 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 14:37:29,882 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 14:37:29,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,893 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:37:29,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:37:29,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,919 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 14:37:29,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:29,930 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 14:37:29,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:29,940 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:29,981 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,015 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,042 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,064 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,079 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,096 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:30,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:30,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:30,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,285 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:30,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:30,359 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,385 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,411 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,438 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,464 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,512 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 14:37:30,512 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:30,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:30,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:30,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:30,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:30,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:37:30,673 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:30,722 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 14:37:30,722 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:37:30,742 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 14:37:30,742 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:30,767 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 14:37:30,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:30,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:37:30,787 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:30,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:30,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:30,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:30,788 INFO L87 Difference]: Start difference. First operand 69 states and 301 transitions. Second operand 8 states. [2019-01-08 14:37:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:31,238 INFO L93 Difference]: Finished difference Result 102 states and 353 transitions. [2019-01-08 14:37:31,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:37:31,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:37:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:31,240 INFO L225 Difference]: With dead ends: 102 [2019-01-08 14:37:31,241 INFO L226 Difference]: Without dead ends: 101 [2019-01-08 14:37:31,241 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-01-08 14:37:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 71. [2019-01-08 14:37:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-01-08 14:37:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 317 transitions. [2019-01-08 14:37:31,266 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 317 transitions. Word has length 5 [2019-01-08 14:37:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:31,266 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 317 transitions. [2019-01-08 14:37:31,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 317 transitions. [2019-01-08 14:37:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:31,266 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:31,267 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:31,267 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:31,267 INFO L82 PathProgramCache]: Analyzing trace with hash 29171496, now seen corresponding path program 1 times [2019-01-08 14:37:31,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:31,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:31,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:31,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:31,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:31,465 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:37:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:31,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:31,506 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:31,507 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:31,507 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [31] [2019-01-08 14:37:31,509 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:31,509 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:31,921 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:31,922 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:37:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:31,922 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:31,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:31,922 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 14:37:31,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:31,936 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:31,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:32,086 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:37:32,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:32,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:32,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:32,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:32,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:32,359 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,397 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,428 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,463 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,492 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:32,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 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 14:37:32,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:32,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:37:32,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:32,548 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 14:37:32,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:32,561 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,601 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,631 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,654 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,673 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,688 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,701 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,751 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 14:37:32,751 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:32,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:32,800 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,843 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:32,844 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:32,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:37:32,880 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:32,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:32,930 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:37:32,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,963 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:32,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:32,965 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:37:32,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:33,017 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 14:37:33,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:37:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:33,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:33,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:33,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:37:33,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:33,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:37:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:37:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:33,081 INFO L87 Difference]: Start difference. First operand 71 states and 317 transitions. Second operand 10 states. [2019-01-08 14:37:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:34,377 INFO L93 Difference]: Finished difference Result 147 states and 540 transitions. [2019-01-08 14:37:34,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:37:34,378 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:37:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:34,380 INFO L225 Difference]: With dead ends: 147 [2019-01-08 14:37:34,380 INFO L226 Difference]: Without dead ends: 146 [2019-01-08 14:37:34,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:37:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-08 14:37:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 89. [2019-01-08 14:37:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-01-08 14:37:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 464 transitions. [2019-01-08 14:37:34,413 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 464 transitions. Word has length 5 [2019-01-08 14:37:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:34,414 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 464 transitions. [2019-01-08 14:37:34,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:37:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 464 transitions. [2019-01-08 14:37:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:34,414 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:34,414 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:34,415 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash 29187556, now seen corresponding path program 1 times [2019-01-08 14:37:34,415 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:34,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:34,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:34,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:34,416 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:34,472 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 14:37:34,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:34,473 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:34,473 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:34,473 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [33] [2019-01-08 14:37:34,474 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:34,474 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:34,809 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:34,809 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:37:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:34,810 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:34,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:34,810 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 14:37:34,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:34,818 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:34,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:34,859 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 14:37:34,861 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 14:37:34,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,869 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 14:37:34,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,881 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 14:37:34,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,896 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 14:37:34,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:34,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:37:34,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:34,921 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:34,960 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:34,991 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,016 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,035 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,052 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,067 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:35,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:35,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:35,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:35,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:35,327 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,353 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,379 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,406 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,433 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,482 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 14:37:35,482 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:35,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:35,524 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:35,567 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:35,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:35,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:37:35,599 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:35,644 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 14:37:35,644 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:37:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:35,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:35,689 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 14:37:35,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:35,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:37:35,708 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:35,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:35,709 INFO L87 Difference]: Start difference. First operand 89 states and 464 transitions. Second operand 8 states. [2019-01-08 14:37:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:36,125 INFO L93 Difference]: Finished difference Result 128 states and 531 transitions. [2019-01-08 14:37:36,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:37:36,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:37:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:36,128 INFO L225 Difference]: With dead ends: 128 [2019-01-08 14:37:36,128 INFO L226 Difference]: Without dead ends: 127 [2019-01-08 14:37:36,128 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-01-08 14:37:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2019-01-08 14:37:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-08 14:37:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 488 transitions. [2019-01-08 14:37:36,164 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 488 transitions. Word has length 5 [2019-01-08 14:37:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:36,164 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 488 transitions. [2019-01-08 14:37:36,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 488 transitions. [2019-01-08 14:37:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:36,165 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:36,165 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:36,166 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash 29187368, now seen corresponding path program 1 times [2019-01-08 14:37:36,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:36,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:36,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:36,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:36,167 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:36,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:36,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:36,290 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:36,290 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [31] [2019-01-08 14:37:36,291 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:36,291 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:36,654 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:36,655 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:37:36,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:36,655 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:36,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:36,655 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 14:37:36,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:36,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:36,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:36,886 WARN L181 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:37:36,907 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 14:37:36,919 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 14:37:36,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:36,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:36,986 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 14:37:37,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,022 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 14:37:37,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,035 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:37:37,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:37:37,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:37,118 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,169 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,206 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,236 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,265 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,287 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,311 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:37,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:37,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:37,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:37,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:37,657 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,683 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,710 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,736 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,764 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:37,812 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:37,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:37,885 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:37,938 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:37,939 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:37,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:37,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:37:37,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:38,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:38,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:37:38,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,063 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:38,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:38,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:37:38,066 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:38,116 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 14:37:38,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:37:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:38,140 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:38,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:38,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:37:38,223 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:38,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:37:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:37:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:37:38,223 INFO L87 Difference]: Start difference. First operand 92 states and 488 transitions. Second operand 10 states. [2019-01-08 14:37:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:38,963 INFO L93 Difference]: Finished difference Result 146 states and 591 transitions. [2019-01-08 14:37:38,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:37:38,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:37:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:38,965 INFO L225 Difference]: With dead ends: 146 [2019-01-08 14:37:38,966 INFO L226 Difference]: Without dead ends: 144 [2019-01-08 14:37:38,966 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:37:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-01-08 14:37:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 98. [2019-01-08 14:37:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-01-08 14:37:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 536 transitions. [2019-01-08 14:37:39,006 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 536 transitions. Word has length 5 [2019-01-08 14:37:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:39,007 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 536 transitions. [2019-01-08 14:37:39,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:37:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 536 transitions. [2019-01-08 14:37:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:39,008 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:39,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:39,008 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:39,008 INFO L82 PathProgramCache]: Analyzing trace with hash 29175836, now seen corresponding path program 1 times [2019-01-08 14:37:39,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:39,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:39,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:39,012 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:39,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:39,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:39,150 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:39,151 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [26], [31] [2019-01-08 14:37:39,151 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:39,151 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:39,518 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:39,518 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:37:39,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:39,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:39,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:39,519 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 14:37:39,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:39,528 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:39,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:39,564 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 14:37:39,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:37:39,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,573 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 14:37:39,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,587 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 14:37:39,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,599 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 14:37:39,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,616 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 14:37:39,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:39,627 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,668 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,699 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,725 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,746 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,764 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,780 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:39,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:39,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:39,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:39,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:39,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:40,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:40,035 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,060 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,086 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,113 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,139 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,187 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:40,187 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:40,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:40,254 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,299 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:40,299 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:40,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,334 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:40,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:37:40,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:40,383 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-08 14:37:40,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:40,449 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:40,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2019-01-08 14:37:40,451 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:40,499 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 14:37:40,500 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-01-08 14:37:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:40,523 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:40,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:40,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:37:40,599 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:40,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:37:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:37:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:37:40,600 INFO L87 Difference]: Start difference. First operand 98 states and 536 transitions. Second operand 10 states. [2019-01-08 14:37:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:41,891 INFO L93 Difference]: Finished difference Result 140 states and 582 transitions. [2019-01-08 14:37:41,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:37:41,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:37:41,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:41,894 INFO L225 Difference]: With dead ends: 140 [2019-01-08 14:37:41,894 INFO L226 Difference]: Without dead ends: 138 [2019-01-08 14:37:41,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:37:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-01-08 14:37:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 92. [2019-01-08 14:37:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-08 14:37:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 486 transitions. [2019-01-08 14:37:41,937 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 486 transitions. Word has length 5 [2019-01-08 14:37:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:41,937 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 486 transitions. [2019-01-08 14:37:41,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:37:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 486 transitions. [2019-01-08 14:37:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:41,938 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:41,938 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:41,938 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:41,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:41,938 INFO L82 PathProgramCache]: Analyzing trace with hash 29191274, now seen corresponding path program 1 times [2019-01-08 14:37:41,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:41,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:41,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:41,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:41,939 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:42,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:42,081 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:42,081 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:42,081 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [28], [31] [2019-01-08 14:37:42,083 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:42,083 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:42,469 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:42,470 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:37:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:42,470 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:42,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:42,470 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 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 14:37:42,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:42,488 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:42,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:42,623 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:37:42,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:42,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:42,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:42,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:42,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:42,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:42,852 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:42,900 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:42,926 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:42,952 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:42,979 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,016 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:43,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:37:43,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:43,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:37:43,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:43,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:37:43,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:43,040 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,088 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,118 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,142 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,159 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,175 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,189 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,239 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:43,240 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:43,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:37:43,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:37:43,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:37:43,446 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-08 14:37:43,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,506 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:43,507 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 83 treesize of output 112 [2019-01-08 14:37:43,508 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:43,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,625 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:43,635 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 88 treesize of output 131 [2019-01-08 14:37:43,636 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-08 14:37:43,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-08 14:37:43,858 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:185 [2019-01-08 14:37:43,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:43,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 136 [2019-01-08 14:37:43,995 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-08 14:37:44,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:44,469 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:44,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 105 [2019-01-08 14:37:44,470 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:44,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-08 14:37:44,681 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2019-01-08 14:37:45,006 WARN L181 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 109 [2019-01-08 14:37:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:45,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:45,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:45,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:37:45,077 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:45,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:37:45,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:37:45,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:45,078 INFO L87 Difference]: Start difference. First operand 92 states and 486 transitions. Second operand 10 states. [2019-01-08 14:37:49,518 WARN L181 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2019-01-08 14:37:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:51,197 INFO L93 Difference]: Finished difference Result 155 states and 683 transitions. [2019-01-08 14:37:51,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:37:51,198 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:37:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:51,200 INFO L225 Difference]: With dead ends: 155 [2019-01-08 14:37:51,200 INFO L226 Difference]: Without dead ends: 154 [2019-01-08 14:37:51,201 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:37:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-01-08 14:37:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2019-01-08 14:37:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-01-08 14:37:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 534 transitions. [2019-01-08 14:37:51,236 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 534 transitions. Word has length 5 [2019-01-08 14:37:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:51,236 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 534 transitions. [2019-01-08 14:37:51,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:37:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 534 transitions. [2019-01-08 14:37:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:51,237 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:51,237 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:51,237 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash 29193322, now seen corresponding path program 1 times [2019-01-08 14:37:51,238 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:51,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:51,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:51,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:51,239 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:51,326 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 14:37:51,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:51,326 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:51,327 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:51,327 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [32], [33] [2019-01-08 14:37:51,328 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:51,328 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:51,616 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:51,616 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:37:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:51,616 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:51,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:51,616 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:37:51,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:51,625 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:51,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:51,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:37:51,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:37:51,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:37:51,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:51,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:37:51,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:37:52,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:37:52,136 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,177 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,218 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,259 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,303 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,347 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:52,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:37:52,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:52,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:37:52,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:52,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:37:52,423 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 14:37:52,424 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,476 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,507 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,532 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,549 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,566 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,581 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,669 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 14:37:52,670 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:37:52,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,704 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 14:37:52,704 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,778 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 14:37:52,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:37:52,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:52,841 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 14:37:52,842 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:52,925 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 14:37:52,926 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-08 14:37:52,960 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 14:37:52,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:53,020 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 14:37:53,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:53,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:37:53,040 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:53,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:53,041 INFO L87 Difference]: Start difference. First operand 98 states and 534 transitions. Second operand 8 states. [2019-01-08 14:37:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:53,665 INFO L93 Difference]: Finished difference Result 137 states and 601 transitions. [2019-01-08 14:37:53,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:37:53,666 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:37:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:53,668 INFO L225 Difference]: With dead ends: 137 [2019-01-08 14:37:53,668 INFO L226 Difference]: Without dead ends: 132 [2019-01-08 14:37:53,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-01-08 14:37:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 100. [2019-01-08 14:37:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-01-08 14:37:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 556 transitions. [2019-01-08 14:37:53,712 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 556 transitions. Word has length 5 [2019-01-08 14:37:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:53,712 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 556 transitions. [2019-01-08 14:37:53,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 556 transitions. [2019-01-08 14:37:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:53,713 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:53,713 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:53,713 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash 29193134, now seen corresponding path program 2 times [2019-01-08 14:37:53,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:53,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:53,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:53,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:53,714 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:53,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:53,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:53,790 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:37:53,790 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:37:53,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:53,791 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:37:53,801 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:37:53,801 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:37:53,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:37:53,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:37:53,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:53,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:37:53,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:37:53,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:53,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:37:54,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,012 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:37:54,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:37:54,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:37:54,202 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,242 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,285 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,326 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,370 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,413 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:54,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 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 14:37:54,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:54,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:37:54,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:54,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 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 14:37:54,501 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 14:37:54,502 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,564 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,600 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,627 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,649 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,668 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,683 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,762 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:54,762 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:37:54,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,867 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 14:37:54,867 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:54,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:54,934 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:37:54,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:54,980 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 14:37:54,980 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:55,049 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 14:37:55,050 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:37:55,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,094 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:55,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:55,096 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 151 [2019-01-08 14:37:55,097 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:55,169 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 14:37:55,169 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:64 [2019-01-08 14:37:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:55,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:55,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:55,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:37:55,259 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:55,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:37:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:37:55,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:37:55,260 INFO L87 Difference]: Start difference. First operand 100 states and 556 transitions. Second operand 10 states. [2019-01-08 14:37:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:56,020 INFO L93 Difference]: Finished difference Result 154 states and 681 transitions. [2019-01-08 14:37:56,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:37:56,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:37:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:56,023 INFO L225 Difference]: With dead ends: 154 [2019-01-08 14:37:56,023 INFO L226 Difference]: Without dead ends: 152 [2019-01-08 14:37:56,024 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:37:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-08 14:37:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2019-01-08 14:37:56,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-01-08 14:37:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 628 transitions. [2019-01-08 14:37:56,085 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 628 transitions. Word has length 5 [2019-01-08 14:37:56,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:56,085 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 628 transitions. [2019-01-08 14:37:56,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:37:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 628 transitions. [2019-01-08 14:37:56,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:56,086 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:56,087 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:56,087 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:56,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:56,087 INFO L82 PathProgramCache]: Analyzing trace with hash 29179868, now seen corresponding path program 1 times [2019-01-08 14:37:56,087 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:56,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:56,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:37:56,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:56,088 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:56,379 WARN L181 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-08 14:37:56,391 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 14:37:56,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:56,391 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:56,391 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:56,391 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [32], [33] [2019-01-08 14:37:56,392 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:56,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:56,633 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:56,633 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:37:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:56,634 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:56,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:56,634 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:37:56,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:56,642 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:56,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:56,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:56,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:56,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:56,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:56,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:56,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:56,915 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:56,940 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:56,968 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:56,993 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,021 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:37:57,059 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:37:57,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:57,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:37:57,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:37:57,070 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 14:37:57,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:57,078 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,116 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,146 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,170 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,189 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,205 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,219 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,269 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 14:37:57,269 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:57,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:57,357 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,401 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:57,402 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:57,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:57,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:37:57,436 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:57,486 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 14:37:57,486 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:37:57,507 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 14:37:57,508 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:57,528 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 14:37:57,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:57,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:37:57,547 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:57,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:37:57,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:37:57,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:37:57,548 INFO L87 Difference]: Start difference. First operand 109 states and 628 transitions. Second operand 8 states. [2019-01-08 14:37:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:37:58,063 INFO L93 Difference]: Finished difference Result 140 states and 686 transitions. [2019-01-08 14:37:58,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:37:58,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:37:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:37:58,065 INFO L225 Difference]: With dead ends: 140 [2019-01-08 14:37:58,065 INFO L226 Difference]: Without dead ends: 139 [2019-01-08 14:37:58,068 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:37:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-01-08 14:37:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2019-01-08 14:37:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-01-08 14:37:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 652 transitions. [2019-01-08 14:37:58,130 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 652 transitions. Word has length 5 [2019-01-08 14:37:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:37:58,130 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 652 transitions. [2019-01-08 14:37:58,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:37:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 652 transitions. [2019-01-08 14:37:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:37:58,131 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:37:58,131 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:37:58,131 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:37:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:58,132 INFO L82 PathProgramCache]: Analyzing trace with hash 29179680, now seen corresponding path program 1 times [2019-01-08 14:37:58,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:37:58,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:58,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:58,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:37:58,133 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:37:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:58,259 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:37:58,259 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:37:58,259 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [26], [31] [2019-01-08 14:37:58,260 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:37:58,260 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:37:58,627 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:37:58,627 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:37:58,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:37:58,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:37:58,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:37:58,628 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:37:58,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:37:58,636 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:37:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:37:58,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:37:58,670 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 14:37:58,677 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 14:37:58,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:37:58,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:37:58,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,708 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 14:37:58,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:58,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:37:58,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:37:58,739 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:58,881 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:58,916 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:58,939 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:58,961 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:58,979 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:58,995 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:37:59,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:37:59,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:37:59,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:37:59,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:37:59,255 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,281 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,307 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,334 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,362 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,412 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:59,412 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:37:59,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:37:59,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,522 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:59,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:37:59,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:37:59,560 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:37:59,611 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:37:59,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,650 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:37:59,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:37:59,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:37:59,653 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:37:59,705 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 14:37:59,705 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:37:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:59,728 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:37:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:37:59,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:37:59,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:37:59,785 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:37:59,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:37:59,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:37:59,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:37:59,786 INFO L87 Difference]: Start difference. First operand 112 states and 652 transitions. Second operand 10 states. [2019-01-08 14:38:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:00,507 INFO L93 Difference]: Finished difference Result 161 states and 770 transitions. [2019-01-08 14:38:00,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:00,508 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:00,510 INFO L225 Difference]: With dead ends: 161 [2019-01-08 14:38:00,510 INFO L226 Difference]: Without dead ends: 159 [2019-01-08 14:38:00,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-01-08 14:38:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2019-01-08 14:38:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-01-08 14:38:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 724 transitions. [2019-01-08 14:38:00,572 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 724 transitions. Word has length 5 [2019-01-08 14:38:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:00,573 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 724 transitions. [2019-01-08 14:38:00,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 724 transitions. [2019-01-08 14:38:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:00,573 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:00,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:00,574 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash 28830064, now seen corresponding path program 1 times [2019-01-08 14:38:00,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:00,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:00,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:00,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:00,575 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:38:00,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:00,699 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:00,700 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:00,700 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [32], [33] [2019-01-08 14:38:00,700 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:00,700 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:00,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:00,924 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:00,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:00,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:00,925 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:00,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:00,934 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:00,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:00,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:00,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:01,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:01,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:01,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:01,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:01,213 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,248 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,285 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,320 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 14:38:01,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 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 14:38:01,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:01,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:38:01,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:38:01,422 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 14:38:01,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:01,433 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,473 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,503 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,526 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,545 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,561 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,575 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,625 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 14:38:01,625 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:01,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:01,676 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,722 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:01,722 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:01,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:01,817 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:01,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:38:01,819 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:01,866 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 14:38:01,866 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-08 14:38:01,885 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 14:38:01,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:01,906 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 14:38:01,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:01,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:38:01,926 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:01,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:01,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:01,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:01,927 INFO L87 Difference]: Start difference. First operand 121 states and 724 transitions. Second operand 8 states. [2019-01-08 14:38:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:02,345 INFO L93 Difference]: Finished difference Result 156 states and 773 transitions. [2019-01-08 14:38:02,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:38:02,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:02,347 INFO L225 Difference]: With dead ends: 156 [2019-01-08 14:38:02,348 INFO L226 Difference]: Without dead ends: 154 [2019-01-08 14:38:02,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-01-08 14:38:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 123. [2019-01-08 14:38:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-01-08 14:38:02,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 733 transitions. [2019-01-08 14:38:02,403 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 733 transitions. Word has length 5 [2019-01-08 14:38:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:02,404 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 733 transitions. [2019-01-08 14:38:02,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 733 transitions. [2019-01-08 14:38:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:02,405 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:02,405 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:02,405 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 28818532, now seen corresponding path program 1 times [2019-01-08 14:38:02,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:02,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:02,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:02,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:02,406 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:02,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:02,676 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:02,677 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:02,677 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [33] [2019-01-08 14:38:02,678 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:02,678 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:03,112 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:03,112 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:03,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:03,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:03,113 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:03,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:03,130 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:03,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:03,351 WARN L181 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:38:03,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:03,794 WARN L181 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-01-08 14:38:03,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:03,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,942 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:03,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:03,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:04,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:04,073 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,101 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,129 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,154 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,183 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,219 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:38:04,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:04,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:04,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:38:04,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:38:04,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:38:04,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:04,240 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,278 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,308 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,331 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,350 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,366 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,380 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,431 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 14:38:04,431 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:04,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:04,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,512 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 14:38:04,512 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:04,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:04,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:38:04,599 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:04,649 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 14:38:04,649 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:38:04,667 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 14:38:04,667 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:04,679 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 14:38:04,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:04,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:38:04,699 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:04,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:04,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:04,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:38:04,700 INFO L87 Difference]: Start difference. First operand 123 states and 733 transitions. Second operand 8 states. [2019-01-08 14:38:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:05,022 INFO L93 Difference]: Finished difference Result 168 states and 891 transitions. [2019-01-08 14:38:05,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:05,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:05,025 INFO L225 Difference]: With dead ends: 168 [2019-01-08 14:38:05,025 INFO L226 Difference]: Without dead ends: 167 [2019-01-08 14:38:05,026 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-01-08 14:38:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2019-01-08 14:38:05,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-01-08 14:38:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 865 transitions. [2019-01-08 14:38:05,090 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 865 transitions. Word has length 5 [2019-01-08 14:38:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:05,090 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 865 transitions. [2019-01-08 14:38:05,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 865 transitions. [2019-01-08 14:38:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:05,091 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:05,091 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:05,091 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash 28818344, now seen corresponding path program 1 times [2019-01-08 14:38:05,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:05,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:05,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:05,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:05,092 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:05,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:05,193 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:05,194 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:05,194 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [26], [31] [2019-01-08 14:38:05,196 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:05,196 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:05,538 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:05,538 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:05,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:05,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:05,539 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:05,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:05,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:05,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:05,581 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 14:38:05,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:05,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,593 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:05,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,600 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:38:05,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,614 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 14:38:05,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:38:05,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:05,648 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,686 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,720 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,747 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,768 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,785 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,801 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:05,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:05,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,880 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:05,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:05,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:05,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:06,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:06,056 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,083 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,109 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,136 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,164 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,212 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 14:38:06,213 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:06,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:06,264 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:06,310 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:06,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:38:06,341 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:06,390 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:38:06,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:06,428 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:06,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2019-01-08 14:38:06,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:06,485 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 14:38:06,485 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:38:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:06,505 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:06,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:06,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:38:06,556 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:06,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:06,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:06,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:06,557 INFO L87 Difference]: Start difference. First operand 139 states and 865 transitions. Second operand 10 states. [2019-01-08 14:38:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:07,289 INFO L93 Difference]: Finished difference Result 242 states and 1262 transitions. [2019-01-08 14:38:07,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:38:07,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:07,293 INFO L225 Difference]: With dead ends: 242 [2019-01-08 14:38:07,293 INFO L226 Difference]: Without dead ends: 240 [2019-01-08 14:38:07,293 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:38:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-01-08 14:38:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2019-01-08 14:38:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-01-08 14:38:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 1177 transitions. [2019-01-08 14:38:07,384 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 1177 transitions. Word has length 5 [2019-01-08 14:38:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:07,384 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 1177 transitions. [2019-01-08 14:38:07,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 1177 transitions. [2019-01-08 14:38:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:07,385 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:07,385 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:07,385 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:07,386 INFO L82 PathProgramCache]: Analyzing trace with hash 28835830, now seen corresponding path program 1 times [2019-01-08 14:38:07,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:07,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:07,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:07,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:07,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:38:07,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:07,481 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:07,481 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:07,481 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [32], [33] [2019-01-08 14:38:07,482 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:07,482 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:07,764 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:07,764 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:07,764 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:07,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:07,765 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:07,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:07,773 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:07,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:07,817 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 14:38:07,823 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 14:38:07,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,829 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 14:38:07,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,843 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 14:38:07,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,856 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 14:38:07,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,868 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 14:38:07,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:07,879 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 14:38:07,880 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:07,941 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:07,982 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,015 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,045 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,071 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,093 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:38:08,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:38:08,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:38:08,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:38:08,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:38:08,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:38:08,533 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,574 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,614 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,655 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,697 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,739 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,810 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 14:38:08,810 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:38:08,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,840 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 14:38:08,841 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:08,912 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 14:38:08,912 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:38:08,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:08,947 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:08,948 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 134 [2019-01-08 14:38:08,949 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:09,015 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 14:38:09,016 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2019-01-08 14:38:09,038 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 14:38:09,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:09,061 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 14:38:09,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:09,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:38:09,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:09,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:09,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:09,081 INFO L87 Difference]: Start difference. First operand 178 states and 1177 transitions. Second operand 8 states. [2019-01-08 14:38:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:09,674 INFO L93 Difference]: Finished difference Result 211 states and 1231 transitions. [2019-01-08 14:38:09,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:38:09,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:09,678 INFO L225 Difference]: With dead ends: 211 [2019-01-08 14:38:09,678 INFO L226 Difference]: Without dead ends: 203 [2019-01-08 14:38:09,679 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-01-08 14:38:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2019-01-08 14:38:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-01-08 14:38:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 1188 transitions. [2019-01-08 14:38:09,764 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 1188 transitions. Word has length 5 [2019-01-08 14:38:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:09,764 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 1188 transitions. [2019-01-08 14:38:09,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 1188 transitions. [2019-01-08 14:38:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:09,766 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:09,766 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:09,766 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:09,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:09,766 INFO L82 PathProgramCache]: Analyzing trace with hash 28822376, now seen corresponding path program 1 times [2019-01-08 14:38:09,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:09,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:09,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:09,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:09,767 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:38:09,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:09,860 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:09,861 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:09,861 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [32], [33] [2019-01-08 14:38:09,862 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:09,862 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:10,146 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:10,147 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:10,147 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:10,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:10,147 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:10,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:10,155 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:10,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:10,182 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 14:38:10,186 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 14:38:10,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,193 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 14:38:10,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,204 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:38:10,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,218 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 14:38:10,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:38:10,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:10,247 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,288 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,321 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,346 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,365 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,382 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,398 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,433 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:10,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,472 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:10,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:10,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:10,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:10,649 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,673 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,700 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,726 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,753 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,799 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 14:38:10,799 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:10,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:10,844 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:10,890 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:10,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:10,920 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:10,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:38:10,921 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:10,967 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 14:38:10,967 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-08 14:38:10,990 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 14:38:10,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:11,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:11,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:38:11,033 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:11,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:11,034 INFO L87 Difference]: Start difference. First operand 176 states and 1188 transitions. Second operand 8 states. [2019-01-08 14:38:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:11,481 INFO L93 Difference]: Finished difference Result 201 states and 1233 transitions. [2019-01-08 14:38:11,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:38:11,481 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:11,483 INFO L225 Difference]: With dead ends: 201 [2019-01-08 14:38:11,484 INFO L226 Difference]: Without dead ends: 200 [2019-01-08 14:38:11,484 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-01-08 14:38:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2019-01-08 14:38:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-01-08 14:38:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 1204 transitions. [2019-01-08 14:38:11,567 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 1204 transitions. Word has length 5 [2019-01-08 14:38:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:11,567 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 1204 transitions. [2019-01-08 14:38:11,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:11,567 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 1204 transitions. [2019-01-08 14:38:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:11,568 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:11,568 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:11,568 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash 29302192, now seen corresponding path program 1 times [2019-01-08 14:38:11,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:11,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:11,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:11,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:11,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:11,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:11,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:11,641 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:11,642 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [31] [2019-01-08 14:38:11,643 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:11,643 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:11,973 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:11,973 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:11,974 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:11,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:11,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:11,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:11,983 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:11,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:12,025 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 14:38:12,028 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 14:38:12,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,038 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 14:38:12,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,049 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 14:38:12,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,060 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:38:12,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,074 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 14:38:12,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:12,086 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,130 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,164 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,189 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,210 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,229 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,245 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,283 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 68 treesize of output 71 [2019-01-08 14:38:12,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,321 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 58 treesize of output 67 [2019-01-08 14:38:12,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:12,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:12,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:12,499 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,526 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,552 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,579 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,606 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,656 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:12,656 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:12,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:12,714 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,757 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:12,757 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:12,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:38:12,793 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:12,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:38:12,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,876 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:12,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:12,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:38:12,879 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:12,930 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 14:38:12,930 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:38:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:12,953 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:13,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:13,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:38:13,010 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:13,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:13,011 INFO L87 Difference]: Start difference. First operand 178 states and 1204 transitions. Second operand 10 states. [2019-01-08 14:38:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:13,858 INFO L93 Difference]: Finished difference Result 245 states and 1358 transitions. [2019-01-08 14:38:13,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:13,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:13,862 INFO L225 Difference]: With dead ends: 245 [2019-01-08 14:38:13,863 INFO L226 Difference]: Without dead ends: 243 [2019-01-08 14:38:13,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-01-08 14:38:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 191. [2019-01-08 14:38:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-01-08 14:38:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1287 transitions. [2019-01-08 14:38:13,976 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1287 transitions. Word has length 5 [2019-01-08 14:38:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:13,976 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1287 transitions. [2019-01-08 14:38:13,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:13,976 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1287 transitions. [2019-01-08 14:38:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:13,977 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:13,977 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:13,977 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 29295188, now seen corresponding path program 1 times [2019-01-08 14:38:13,978 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:13,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:13,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:13,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:13,978 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:14,060 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 14:38:14,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:14,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:14,061 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:14,061 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [32], [33] [2019-01-08 14:38:14,062 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:14,062 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:14,391 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:14,391 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:14,392 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:14,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:14,392 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:14,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:14,405 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:14,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:14,592 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:38:14,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:14,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:14,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:14,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:14,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:14,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:14,803 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:14,828 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:14,854 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:14,880 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:14,904 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:14,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:38:14,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:14,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:14,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:38:14,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:38:14,960 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 14:38:14,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:14,967 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,006 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,035 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,057 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,075 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,091 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,105 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,155 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 14:38:15,156 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:15,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,189 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:15,189 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,231 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 14:38:15,232 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:15,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:15,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:38:15,260 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:15,307 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 14:38:15,308 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:38:15,327 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 14:38:15,327 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:15,333 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 14:38:15,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:15,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-08 14:38:15,353 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:15,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:15,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:38:15,354 INFO L87 Difference]: Start difference. First operand 191 states and 1287 transitions. Second operand 8 states. [2019-01-08 14:38:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:15,736 INFO L93 Difference]: Finished difference Result 343 states and 2333 transitions. [2019-01-08 14:38:15,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:15,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:15,742 INFO L225 Difference]: With dead ends: 343 [2019-01-08 14:38:15,742 INFO L226 Difference]: Without dead ends: 342 [2019-01-08 14:38:15,742 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:38:15,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-01-08 14:38:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 304. [2019-01-08 14:38:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2019-01-08 14:38:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 2201 transitions. [2019-01-08 14:38:15,882 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 2201 transitions. Word has length 5 [2019-01-08 14:38:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:15,883 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 2201 transitions. [2019-01-08 14:38:15,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 2201 transitions. [2019-01-08 14:38:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:15,884 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:15,884 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:15,884 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 29295000, now seen corresponding path program 1 times [2019-01-08 14:38:15,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:15,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:15,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:15,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:15,886 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:16,245 WARN L181 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2019-01-08 14:38:16,598 WARN L181 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2019-01-08 14:38:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:16,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:16,694 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:16,694 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:16,694 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [26], [31] [2019-01-08 14:38:16,695 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:16,695 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:16,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:16,991 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:16,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:16,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:16,992 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:17,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:17,000 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:17,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:17,033 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 14:38:17,038 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 14:38:17,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,044 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 14:38:17,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,059 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 14:38:17,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,070 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 14:38:17,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:38:17,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:17,097 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,137 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,171 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,195 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,217 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,232 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,249 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:17,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:17,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:17,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:17,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:17,507 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,534 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,560 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,587 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,613 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,663 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:17,663 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:17,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:17,741 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,786 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:17,787 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:17,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:38:17,824 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,871 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:17,872 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:38:17,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:17,914 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:17,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2019-01-08 14:38:17,916 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:17,970 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 14:38:17,970 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:38:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:17,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:18,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:18,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:38:18,050 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:18,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:18,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:18,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:18,051 INFO L87 Difference]: Start difference. First operand 304 states and 2201 transitions. Second operand 10 states. [2019-01-08 14:38:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:19,861 INFO L93 Difference]: Finished difference Result 369 states and 2390 transitions. [2019-01-08 14:38:19,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:19,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:19,867 INFO L225 Difference]: With dead ends: 369 [2019-01-08 14:38:19,867 INFO L226 Difference]: Without dead ends: 367 [2019-01-08 14:38:19,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-01-08 14:38:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 320. [2019-01-08 14:38:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-01-08 14:38:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 2329 transitions. [2019-01-08 14:38:19,999 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 2329 transitions. Word has length 5 [2019-01-08 14:38:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:20,000 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 2329 transitions. [2019-01-08 14:38:20,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 2329 transitions. [2019-01-08 14:38:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:20,001 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:20,001 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:20,001 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:20,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:20,001 INFO L82 PathProgramCache]: Analyzing trace with hash 29312486, now seen corresponding path program 1 times [2019-01-08 14:38:20,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:20,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:20,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:20,003 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:20,417 WARN L181 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2019-01-08 14:38:20,430 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 14:38:20,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:20,430 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:20,431 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:20,431 INFO L207 CegarAbsIntRunner]: [0], [22], [28], [32], [33] [2019-01-08 14:38:20,431 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:20,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:20,675 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:20,675 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:20,675 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:20,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:20,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:20,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:20,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:20,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:20,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:38:20,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,785 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:38:20,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:38:20,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:38:20,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:20,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,000 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:38:21,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:38:21,110 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,157 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,207 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,254 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,310 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,359 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:38:21,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:21,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:21,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 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 14:38:21,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:38:21,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:38:21,437 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 14:38:21,437 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,490 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,520 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,544 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,563 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,579 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,593 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,662 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 14:38:21,663 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:38:21,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,708 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 14:38:21,709 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,778 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 14:38:21,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:38:21,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:21,870 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:21,870 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 134 [2019-01-08 14:38:21,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:21,938 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 14:38:21,938 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2019-01-08 14:38:21,972 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 14:38:21,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:21,995 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 14:38:22,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:22,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:38:22,015 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:22,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:22,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:22,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:22,016 INFO L87 Difference]: Start difference. First operand 320 states and 2329 transitions. Second operand 8 states. [2019-01-08 14:38:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:22,676 INFO L93 Difference]: Finished difference Result 354 states and 2377 transitions. [2019-01-08 14:38:22,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:38:22,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:22,682 INFO L225 Difference]: With dead ends: 354 [2019-01-08 14:38:22,682 INFO L226 Difference]: Without dead ends: 350 [2019-01-08 14:38:22,682 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-01-08 14:38:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2019-01-08 14:38:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2019-01-08 14:38:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 2346 transitions. [2019-01-08 14:38:22,825 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 2346 transitions. Word has length 5 [2019-01-08 14:38:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:22,826 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 2346 transitions. [2019-01-08 14:38:22,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 2346 transitions. [2019-01-08 14:38:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:22,827 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:22,827 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:22,827 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:22,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:22,827 INFO L82 PathProgramCache]: Analyzing trace with hash 29299032, now seen corresponding path program 1 times [2019-01-08 14:38:22,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:22,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:22,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:22,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:22,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:22,950 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 14:38:22,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:22,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:22,951 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:22,951 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [32], [33] [2019-01-08 14:38:22,952 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:22,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:23,201 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:23,202 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:23,202 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:23,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:23,202 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:23,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:23,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:23,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:23,244 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 14:38:23,247 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:23,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,254 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 14:38:23,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,267 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 14:38:23,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,279 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 14:38:23,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,299 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 14:38:23,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:23,314 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,372 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,411 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,445 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,471 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,492 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,511 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:23,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:23,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:23,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:23,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:23,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:23,825 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,853 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,880 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,907 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,934 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:23,984 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 14:38:23,985 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:24,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:24,027 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:24,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:24,073 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:24,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:24,101 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:24,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:38:24,103 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:24,151 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 14:38:24,151 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-08 14:38:24,174 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 14:38:24,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:24,195 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 14:38:24,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:24,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:38:24,214 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:24,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:24,215 INFO L87 Difference]: Start difference. First operand 323 states and 2346 transitions. Second operand 8 states. [2019-01-08 14:38:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:24,857 INFO L93 Difference]: Finished difference Result 347 states and 2375 transitions. [2019-01-08 14:38:24,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:38:24,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:24,863 INFO L225 Difference]: With dead ends: 347 [2019-01-08 14:38:24,863 INFO L226 Difference]: Without dead ends: 346 [2019-01-08 14:38:24,863 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2019-01-08 14:38:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 324. [2019-01-08 14:38:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-01-08 14:38:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 2354 transitions. [2019-01-08 14:38:25,023 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 2354 transitions. Word has length 5 [2019-01-08 14:38:25,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:25,023 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 2354 transitions. [2019-01-08 14:38:25,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 2354 transitions. [2019-01-08 14:38:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:25,025 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:25,025 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:25,025 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:25,025 INFO L82 PathProgramCache]: Analyzing trace with hash 28958902, now seen corresponding path program 1 times [2019-01-08 14:38:25,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:25,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:25,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:25,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:25,026 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:25,095 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 14:38:25,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:25,095 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:25,095 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:25,095 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [34], [35] [2019-01-08 14:38:25,096 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:25,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:25,270 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:25,271 INFO L272 AbstractInterpreter]: Visited 5 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:38:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:25,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:25,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:25,271 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:25,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:25,279 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:25,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:25,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:25,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:25,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:25,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:25,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:25,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:25,570 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,606 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,643 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,680 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,719 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:38:25,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:25,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:25,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:38:25,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:38:25,781 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 14:38:25,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:25,791 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,829 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,860 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,884 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,902 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,918 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,933 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:25,983 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 14:38:25,983 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:26,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:26,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:26,022 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:26,068 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 14:38:26,068 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:26,087 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 14:38:26,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:26,097 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 14:38:26,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:26,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:38:26,117 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:26,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:38:26,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:38:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:38:26,118 INFO L87 Difference]: Start difference. First operand 324 states and 2354 transitions. Second operand 6 states. [2019-01-08 14:38:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:26,452 INFO L93 Difference]: Finished difference Result 344 states and 2373 transitions. [2019-01-08 14:38:26,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:38:26,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-08 14:38:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:26,457 INFO L225 Difference]: With dead ends: 344 [2019-01-08 14:38:26,458 INFO L226 Difference]: Without dead ends: 343 [2019-01-08 14:38:26,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:38:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-01-08 14:38:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2019-01-08 14:38:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-01-08 14:38:26,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 2354 transitions. [2019-01-08 14:38:26,598 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 2354 transitions. Word has length 5 [2019-01-08 14:38:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:26,599 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 2354 transitions. [2019-01-08 14:38:26,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:38:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 2354 transitions. [2019-01-08 14:38:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:26,600 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:26,600 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:26,600 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash 28945258, now seen corresponding path program 1 times [2019-01-08 14:38:26,600 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:26,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:26,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:26,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:26,601 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:26,778 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2019-01-08 14:38:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:26,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:26,835 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:26,835 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:26,835 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [31] [2019-01-08 14:38:26,838 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:26,838 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:27,187 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:27,188 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:27,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:27,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:27,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:27,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:27,197 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:27,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:27,237 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 14:38:27,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:27,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,250 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 14:38:27,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,261 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 14:38:27,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,290 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 14:38:27,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,300 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 14:38:27,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:27,312 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,356 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,386 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,411 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,432 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,447 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,463 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:27,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:27,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:27,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:27,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:27,705 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,730 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,755 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,780 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,806 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:27,853 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:27,854 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:27,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:27,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-08 14:38:27,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:38:28,084 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:38:28,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-08 14:38:28,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,165 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:28,174 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 88 treesize of output 117 [2019-01-08 14:38:28,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:38:28,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,400 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:28,401 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 83 treesize of output 130 [2019-01-08 14:38:28,402 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:28,576 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-08 14:38:28,577 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:189 [2019-01-08 14:38:28,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:28,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 152 [2019-01-08 14:38:28,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-08 14:38:29,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:29,293 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:29,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 103 [2019-01-08 14:38:29,294 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:29,503 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-08 14:38:29,503 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2019-01-08 14:38:35,892 WARN L181 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 211 DAG size of output: 109 [2019-01-08 14:38:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:35,893 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:35,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:35,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:38:35,989 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:35,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:35,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:35,990 INFO L87 Difference]: Start difference. First operand 324 states and 2354 transitions. Second operand 10 states. [2019-01-08 14:38:36,595 WARN L181 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 89 [2019-01-08 14:38:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:38,776 INFO L93 Difference]: Finished difference Result 434 states and 2876 transitions. [2019-01-08 14:38:38,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:38:38,776 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:38,782 INFO L225 Difference]: With dead ends: 434 [2019-01-08 14:38:38,782 INFO L226 Difference]: Without dead ends: 432 [2019-01-08 14:38:38,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:38:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2019-01-08 14:38:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 339. [2019-01-08 14:38:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2019-01-08 14:38:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 2453 transitions. [2019-01-08 14:38:38,930 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 2453 transitions. Word has length 5 [2019-01-08 14:38:38,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:38,930 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 2453 transitions. [2019-01-08 14:38:38,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:38,930 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 2453 transitions. [2019-01-08 14:38:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:38,931 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:38,931 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:38,931 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:38,932 INFO L82 PathProgramCache]: Analyzing trace with hash 28933852, now seen corresponding path program 2 times [2019-01-08 14:38:38,932 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:38,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:38,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:38,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:38,932 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:38,999 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 14:38:38,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:38,999 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:39,000 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:39,000 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:39,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:39,000 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:39,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:38:39,012 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:38:39,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-08 14:38:39,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:39,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:39,053 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 14:38:39,057 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 14:38:39,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:38:39,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,075 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 14:38:39,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,086 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 14:38:39,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,105 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 14:38:39,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,120 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 14:38:39,120 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,181 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,215 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,241 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,263 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,281 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,298 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,340 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 91 treesize of output 91 [2019-01-08 14:38:39,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:38:39,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:38:39,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:38:39,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:38:39,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:38:39,693 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,734 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,774 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,815 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,857 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,899 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:39,969 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:39,970 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:118, output treesize:120 [2019-01-08 14:38:39,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:39,993 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 14:38:39,993 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:40,063 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 14:38:40,063 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:38:40,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:40,094 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 14:38:40,095 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:40,167 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 14:38:40,167 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-08 14:38:40,187 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 14:38:40,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:40,203 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 14:38:40,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:40,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:38:40,223 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:40,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:38:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:38:40,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:38:40,223 INFO L87 Difference]: Start difference. First operand 339 states and 2453 transitions. Second operand 8 states. [2019-01-08 14:38:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:41,451 INFO L93 Difference]: Finished difference Result 472 states and 3201 transitions. [2019-01-08 14:38:41,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:38:41,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:38:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:41,457 INFO L225 Difference]: With dead ends: 472 [2019-01-08 14:38:41,457 INFO L226 Difference]: Without dead ends: 471 [2019-01-08 14:38:41,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:38:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-01-08 14:38:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 396. [2019-01-08 14:38:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-01-08 14:38:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 2917 transitions. [2019-01-08 14:38:41,628 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 2917 transitions. Word has length 5 [2019-01-08 14:38:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:41,629 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 2917 transitions. [2019-01-08 14:38:41,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:38:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 2917 transitions. [2019-01-08 14:38:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:41,630 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:41,630 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:41,630 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 28952946, now seen corresponding path program 1 times [2019-01-08 14:38:41,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:41,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:41,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:41,631 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:41,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:41,834 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:41,834 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:41,834 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [28], [31] [2019-01-08 14:38:41,835 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:41,835 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:42,169 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:42,170 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:42,170 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:42,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:42,170 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:42,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:42,178 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:42,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:42,217 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 14:38:42,219 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 14:38:42,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,227 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 14:38:42,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,240 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 14:38:42,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,252 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 14:38:42,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,266 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 14:38:42,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:42,281 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,324 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,358 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,383 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,403 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,418 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,433 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:42,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:42,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,553 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:42,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:42,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:42,681 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,707 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,734 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,760 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,788 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:42,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:42,839 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:42,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:42,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-08 14:38:42,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:38:43,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:38:43,055 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-08 14:38:43,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,114 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:43,115 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 83 treesize of output 128 [2019-01-08 14:38:43,116 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:43,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,243 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:43,253 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 88 treesize of output 133 [2019-01-08 14:38:43,254 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-08 14:38:43,456 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-08 14:38:43,456 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:189 [2019-01-08 14:38:43,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:43,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 136 [2019-01-08 14:38:43,607 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-08 14:38:44,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:44,132 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:44,132 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 73 treesize of output 109 [2019-01-08 14:38:44,133 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:44,357 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 2 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-08 14:38:44,357 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 13 variables, input treesize:152, output treesize:346 [2019-01-08 14:38:44,675 WARN L181 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 109 [2019-01-08 14:38:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:44,677 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:44,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:44,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:38:44,748 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:44,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:38:44,749 INFO L87 Difference]: Start difference. First operand 396 states and 2917 transitions. Second operand 10 states. [2019-01-08 14:38:45,438 WARN L181 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 88 [2019-01-08 14:38:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:46,856 INFO L93 Difference]: Finished difference Result 485 states and 3298 transitions. [2019-01-08 14:38:46,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:38:46,856 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:46,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:46,862 INFO L225 Difference]: With dead ends: 485 [2019-01-08 14:38:46,862 INFO L226 Difference]: Without dead ends: 484 [2019-01-08 14:38:46,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:38:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2019-01-08 14:38:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 400. [2019-01-08 14:38:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2019-01-08 14:38:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 2949 transitions. [2019-01-08 14:38:47,065 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 2949 transitions. Word has length 5 [2019-01-08 14:38:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:47,065 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 2949 transitions. [2019-01-08 14:38:47,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:47,065 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 2949 transitions. [2019-01-08 14:38:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:47,066 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:47,066 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:47,067 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:47,067 INFO L82 PathProgramCache]: Analyzing trace with hash 28954558, now seen corresponding path program 2 times [2019-01-08 14:38:47,067 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:47,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:47,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:47,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:47,068 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:47,495 WARN L181 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2019-01-08 14:38:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:47,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:47,539 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:47,539 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:47,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:47,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:47,540 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:47,548 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:38:47,549 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:38:47,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:38:47,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:47,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:47,588 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 14:38:47,592 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 14:38:47,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:38:47,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,602 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 14:38:47,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,611 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 14:38:47,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,622 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 14:38:47,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,633 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 14:38:47,634 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,716 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,749 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,773 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,795 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,811 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,828 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:47,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:38:47,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,918 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:38:47,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:47,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:38:48,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:38:48,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:38:48,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:38:48,223 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,264 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,304 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,345 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,387 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,429 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,498 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:48,498 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:38:48,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:38:48,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,607 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:48,607 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:38:48,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,648 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 14:38:48,648 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,718 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 14:38:48,719 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:38:48,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:48,766 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:48,767 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 153 [2019-01-08 14:38:48,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:48,838 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 14:38:48,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:38:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:48,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:48,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:48,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:38:48,927 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:48,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:48,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:48,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:48,927 INFO L87 Difference]: Start difference. First operand 400 states and 2949 transitions. Second operand 10 states. [2019-01-08 14:38:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:49,952 INFO L93 Difference]: Finished difference Result 485 states and 3293 transitions. [2019-01-08 14:38:49,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:49,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:49,960 INFO L225 Difference]: With dead ends: 485 [2019-01-08 14:38:49,960 INFO L226 Difference]: Without dead ends: 480 [2019-01-08 14:38:49,960 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2019-01-08 14:38:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 435. [2019-01-08 14:38:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2019-01-08 14:38:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 3230 transitions. [2019-01-08 14:38:50,140 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 3230 transitions. Word has length 5 [2019-01-08 14:38:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:50,140 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 3230 transitions. [2019-01-08 14:38:50,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 3230 transitions. [2019-01-08 14:38:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:50,142 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:50,142 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:50,142 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:50,142 INFO L82 PathProgramCache]: Analyzing trace with hash 28954806, now seen corresponding path program 2 times [2019-01-08 14:38:50,143 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:50,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:50,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:50,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:50,143 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:50,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:50,219 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:50,219 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:38:50,219 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:38:50,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:50,219 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:50,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:38:50,229 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:38:50,251 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:38:50,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:38:50,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:50,289 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 14:38:50,293 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 14:38:50,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,300 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 14:38:50,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,306 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 14:38:50,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,317 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 14:38:50,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,327 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:38:50,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,339 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 14:38:50,339 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,400 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,432 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,457 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,480 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,495 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,512 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,555 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:38:50,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:38:50,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:38:50,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:38:50,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:38:50,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:50,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:38:50,916 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,957 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:50,997 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,038 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,080 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,121 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:51,191 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:38:51,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,228 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 14:38:51,228 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,298 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:51,298 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:38:51,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,340 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 14:38:51,341 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,411 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 14:38:51,411 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:38:51,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:51,529 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:51,530 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 163 [2019-01-08 14:38:51,530 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:51,615 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 14:38:51,615 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:38:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:51,640 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:51,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:51,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:38:51,701 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:51,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:51,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:51,702 INFO L87 Difference]: Start difference. First operand 435 states and 3230 transitions. Second operand 10 states. [2019-01-08 14:38:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:52,502 INFO L93 Difference]: Finished difference Result 501 states and 3456 transitions. [2019-01-08 14:38:52,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:52,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:52,508 INFO L225 Difference]: With dead ends: 501 [2019-01-08 14:38:52,509 INFO L226 Difference]: Without dead ends: 499 [2019-01-08 14:38:52,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-01-08 14:38:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 457. [2019-01-08 14:38:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2019-01-08 14:38:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 3406 transitions. [2019-01-08 14:38:52,705 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 3406 transitions. Word has length 5 [2019-01-08 14:38:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:52,705 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 3406 transitions. [2019-01-08 14:38:52,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 3406 transitions. [2019-01-08 14:38:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:52,706 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:52,706 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:52,706 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:52,707 INFO L82 PathProgramCache]: Analyzing trace with hash 28941104, now seen corresponding path program 1 times [2019-01-08 14:38:52,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:52,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:52,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:38:52,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:52,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:52,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:52,803 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:52,804 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:52,804 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [31] [2019-01-08 14:38:52,804 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:52,804 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:53,135 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:53,135 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:53,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:53,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:53,136 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:53,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:53,146 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:53,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:53,184 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 14:38:53,186 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 14:38:53,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,197 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 14:38:53,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,208 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:38:53,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,252 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 14:38:53,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,280 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 14:38:53,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:53,294 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,334 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,366 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,390 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,409 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,425 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,442 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:53,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:53,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:53,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:53,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:53,693 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,718 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,744 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,771 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,798 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,847 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:53,847 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:53,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:53,910 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:53,957 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:53,958 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:53,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:53,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:38:53,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:54,045 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:54,046 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:38:54,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:54,121 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:54,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:38:54,122 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:54,193 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 14:38:54,194 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:38:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:54,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:54,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:54,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:38:54,330 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:54,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:54,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:54,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:54,330 INFO L87 Difference]: Start difference. First operand 457 states and 3406 transitions. Second operand 10 states. [2019-01-08 14:38:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:55,325 INFO L93 Difference]: Finished difference Result 539 states and 3726 transitions. [2019-01-08 14:38:55,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:55,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:55,332 INFO L225 Difference]: With dead ends: 539 [2019-01-08 14:38:55,332 INFO L226 Difference]: Without dead ends: 537 [2019-01-08 14:38:55,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:55,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2019-01-08 14:38:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 492. [2019-01-08 14:38:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2019-01-08 14:38:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 3666 transitions. [2019-01-08 14:38:55,502 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 3666 transitions. Word has length 5 [2019-01-08 14:38:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:55,502 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 3666 transitions. [2019-01-08 14:38:55,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:55,502 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 3666 transitions. [2019-01-08 14:38:55,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:55,503 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:55,503 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:55,504 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:55,504 INFO L82 PathProgramCache]: Analyzing trace with hash 28941352, now seen corresponding path program 1 times [2019-01-08 14:38:55,504 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:55,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:55,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:55,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:55,505 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:55,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:55,599 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:55,599 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:55,599 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [26], [31] [2019-01-08 14:38:55,601 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:55,601 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:55,944 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:55,944 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:38:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:55,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:55,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:55,944 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:55,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:55,953 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:55,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:55,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:55,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:38:56,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:38:56,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:38:56,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:38:56,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:38:56,220 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,246 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,274 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,302 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,330 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:38:56,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 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 14:38:56,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 14:38:56,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:38:56,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:38:56,383 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 14:38:56,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:38:56,479 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,519 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,549 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,572 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,591 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,607 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,621 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,670 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:56,671 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:38:56,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:38:56,791 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,837 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:56,838 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:38:56,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:38:56,875 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:56,922 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:38:56,923 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:38:56,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:56,963 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:38:56,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 128 [2019-01-08 14:38:56,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:57,018 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 14:38:57,018 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:38:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:57,039 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:38:57,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:57,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:38:57,099 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:57,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:38:57,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:38:57,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:38:57,099 INFO L87 Difference]: Start difference. First operand 492 states and 3666 transitions. Second operand 10 states. [2019-01-08 14:38:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:57,891 INFO L93 Difference]: Finished difference Result 551 states and 3869 transitions. [2019-01-08 14:38:57,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:38:57,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-08 14:38:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:57,899 INFO L225 Difference]: With dead ends: 551 [2019-01-08 14:38:57,899 INFO L226 Difference]: Without dead ends: 549 [2019-01-08 14:38:57,899 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:38:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2019-01-08 14:38:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 509. [2019-01-08 14:38:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2019-01-08 14:38:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 3822 transitions. [2019-01-08 14:38:58,085 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 3822 transitions. Word has length 5 [2019-01-08 14:38:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:58,086 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 3822 transitions. [2019-01-08 14:38:58,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:38:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 3822 transitions. [2019-01-08 14:38:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:58,087 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:58,087 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:58,088 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash 29435558, now seen corresponding path program 1 times [2019-01-08 14:38:58,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:58,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:58,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:58,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:58,089 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:58,131 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 14:38:58,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:58,131 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:58,131 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:58,132 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [34], [35] [2019-01-08 14:38:58,134 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:58,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:58,305 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:58,306 INFO L272 AbstractInterpreter]: Visited 5 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:38:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:58,306 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:58,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:58,306 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:38:58,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:58,314 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:38:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:58,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:38:58,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,343 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 57 treesize of output 63 [2019-01-08 14:38:58,349 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 59 treesize of output 48 [2019-01-08 14:38:58,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,388 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2019-01-08 14:38:58,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,446 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:38:58,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:38:58,512 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,535 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,559 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,585 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,611 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,643 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:38:58,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:38:58,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 14:38:58,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 14:38:58,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 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 14:38:58,665 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 14:38:58,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:38:58,677 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,721 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,748 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,767 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,782 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,798 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,813 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,857 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 14:38:58,858 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:84, output treesize:88 [2019-01-08 14:38:58,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:38:58,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 89 [2019-01-08 14:38:58,901 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:38:58,951 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 14:38:58,952 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:63 [2019-01-08 14:38:58,973 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 14:38:58,973 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:38:58,982 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 14:38:59,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:38:59,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:38:59,003 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:38:59,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:38:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:38:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:38:59,004 INFO L87 Difference]: Start difference. First operand 509 states and 3822 transitions. Second operand 6 states. [2019-01-08 14:38:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:38:59,387 INFO L93 Difference]: Finished difference Result 523 states and 3832 transitions. [2019-01-08 14:38:59,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:38:59,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2019-01-08 14:38:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:38:59,392 INFO L225 Difference]: With dead ends: 523 [2019-01-08 14:38:59,392 INFO L226 Difference]: Without dead ends: 522 [2019-01-08 14:38:59,393 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:38:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2019-01-08 14:38:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 509. [2019-01-08 14:38:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2019-01-08 14:38:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 3821 transitions. [2019-01-08 14:38:59,610 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 3821 transitions. Word has length 5 [2019-01-08 14:38:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:38:59,610 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 3821 transitions. [2019-01-08 14:38:59,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:38:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 3821 transitions. [2019-01-08 14:38:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:38:59,611 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:38:59,611 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:38:59,612 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:38:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:59,612 INFO L82 PathProgramCache]: Analyzing trace with hash 29425884, now seen corresponding path program 1 times [2019-01-08 14:38:59,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:38:59,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:59,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:38:59,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:38:59,613 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:38:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:38:59,742 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 14:38:59,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:59,743 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:38:59,743 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:38:59,743 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [32], [33] [2019-01-08 14:38:59,744 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:38:59,744 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:38:59,991 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:38:59,991 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:38:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:38:59,991 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:38:59,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:38:59,991 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:00,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:00,001 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:00,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:00,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:00,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:00,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:00,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:00,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,264 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:00,265 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,293 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,318 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,346 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,373 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:00,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:00,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 14:39:00,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:00,416 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:39:00,419 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 14:39:00,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:00,429 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,465 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,494 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,517 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,535 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,550 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,565 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,612 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 14:39:00,613 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:00,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,684 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:39:00,684 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,729 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:00,729 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:00,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:00,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:39:00,759 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:00,807 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 14:39:00,808 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:00,828 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 14:39:00,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:00,854 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 14:39:00,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:00,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:39:00,873 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:00,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:39:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:39:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:39:00,873 INFO L87 Difference]: Start difference. First operand 509 states and 3821 transitions. Second operand 8 states. [2019-01-08 14:39:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:01,575 INFO L93 Difference]: Finished difference Result 542 states and 3850 transitions. [2019-01-08 14:39:01,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:39:01,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:39:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:01,581 INFO L225 Difference]: With dead ends: 542 [2019-01-08 14:39:01,581 INFO L226 Difference]: Without dead ends: 540 [2019-01-08 14:39:01,581 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:39:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-01-08 14:39:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2019-01-08 14:39:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2019-01-08 14:39:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 3820 transitions. [2019-01-08 14:39:01,768 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 3820 transitions. Word has length 5 [2019-01-08 14:39:01,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:01,768 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 3820 transitions. [2019-01-08 14:39:01,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:39:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 3820 transitions. [2019-01-08 14:39:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:39:01,769 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:01,769 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:39:01,769 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 29431650, now seen corresponding path program 1 times [2019-01-08 14:39:01,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:01,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:01,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:01,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:01,771 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:01,817 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 14:39:01,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:01,818 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:01,818 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:39:01,818 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [32], [33] [2019-01-08 14:39:01,819 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:01,819 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:02,065 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:02,065 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:39:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:02,065 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:02,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:02,065 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:02,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:02,098 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:02,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:02,136 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 14:39:02,139 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 14:39:02,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,149 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 14:39:02,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,159 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 14:39:02,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,170 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 14:39:02,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,181 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 14:39:02,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,194 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 14:39:02,195 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,252 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,285 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,313 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,332 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,349 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,366 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:02,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:02,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:02,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,582 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:02,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:02,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:02,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:02,772 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,813 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,853 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,894 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,936 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:02,978 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:03,047 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 14:39:03,048 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:03,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,075 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 14:39:03,075 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:03,144 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 14:39:03,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:03,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:03,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:39:03,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:03,249 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 14:39:03,249 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-08 14:39:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:03,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:03,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:03,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:39:03,325 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:03,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:39:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:39:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:39:03,326 INFO L87 Difference]: Start difference. First operand 509 states and 3820 transitions. Second operand 8 states. [2019-01-08 14:39:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:04,105 INFO L93 Difference]: Finished difference Result 541 states and 3851 transitions. [2019-01-08 14:39:04,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:39:04,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:39:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:04,109 INFO L225 Difference]: With dead ends: 541 [2019-01-08 14:39:04,109 INFO L226 Difference]: Without dead ends: 540 [2019-01-08 14:39:04,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:39:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2019-01-08 14:39:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 509. [2019-01-08 14:39:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2019-01-08 14:39:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 3820 transitions. [2019-01-08 14:39:04,284 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 3820 transitions. Word has length 5 [2019-01-08 14:39:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:04,285 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 3820 transitions. [2019-01-08 14:39:04,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:39:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 3820 transitions. [2019-01-08 14:39:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:39:04,286 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:04,286 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:39:04,287 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:04,287 INFO L82 PathProgramCache]: Analyzing trace with hash 29418196, now seen corresponding path program 1 times [2019-01-08 14:39:04,287 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:04,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:04,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:04,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:04,288 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:04,413 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 14:39:04,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:04,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:04,414 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:39:04,414 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [32], [33] [2019-01-08 14:39:04,415 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:04,415 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:04,633 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:04,633 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:39:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:04,633 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:04,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:04,633 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:04,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:04,641 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:04,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:04,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,680 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:04,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:04,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:04,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:04,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:04,910 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:04,911 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:04,939 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:04,965 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:04,994 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,022 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:05,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:05,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:39:05,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:05,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:39:05,088 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 14:39:05,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:05,096 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,136 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,165 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,189 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,208 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,224 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,238 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,288 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 14:39:05,289 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:05,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:39:05,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,381 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:05,382 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:05,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:05,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:39:05,416 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:05,466 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 14:39:05,467 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:05,487 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 14:39:05,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:05,517 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 14:39:05,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:05,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:39:05,537 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:05,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:39:05,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:39:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:39:05,538 INFO L87 Difference]: Start difference. First operand 509 states and 3820 transitions. Second operand 8 states. [2019-01-08 14:39:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:06,217 INFO L93 Difference]: Finished difference Result 573 states and 3948 transitions. [2019-01-08 14:39:06,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:39:06,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:39:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:06,221 INFO L225 Difference]: With dead ends: 573 [2019-01-08 14:39:06,221 INFO L226 Difference]: Without dead ends: 572 [2019-01-08 14:39:06,221 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:39:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2019-01-08 14:39:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 517. [2019-01-08 14:39:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2019-01-08 14:39:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 3892 transitions. [2019-01-08 14:39:06,393 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 3892 transitions. Word has length 5 [2019-01-08 14:39:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:06,393 INFO L480 AbstractCegarLoop]: Abstraction has 517 states and 3892 transitions. [2019-01-08 14:39:06,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:39:06,393 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 3892 transitions. [2019-01-08 14:39:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-08 14:39:06,394 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:06,394 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-08 14:39:06,395 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash 29477778, now seen corresponding path program 1 times [2019-01-08 14:39:06,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:06,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:06,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:06,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:06,396 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:06,485 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 14:39:06,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:06,486 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:06,486 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-08 14:39:06,486 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [32], [33] [2019-01-08 14:39:06,487 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:06,487 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:07,032 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:07,032 INFO L272 AbstractInterpreter]: Visited 5 different actions 11 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:39:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:07,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:07,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:07,032 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:07,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:07,040 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:07,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:07,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:07,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:07,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:07,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:07,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:07,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:07,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:07,473 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,522 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,569 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,617 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,664 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,714 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,774 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:07,780 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:07,822 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:39:07,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:07,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:39:07,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:39:07,886 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 14:39:07,887 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,943 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,974 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:07,996 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:08,015 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:08,030 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:08,044 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:08,135 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 14:39:08,135 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:08,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,163 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 14:39:08,163 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:08,228 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 14:39:08,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:08,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:08,266 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:08,267 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 134 [2019-01-08 14:39:08,267 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:08,333 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 14:39:08,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:80 [2019-01-08 14:39:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:08,371 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:08,391 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 14:39:08,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:08,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:39:08,411 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:08,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:39:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:39:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:39:08,412 INFO L87 Difference]: Start difference. First operand 517 states and 3892 transitions. Second operand 8 states. [2019-01-08 14:39:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:09,057 INFO L93 Difference]: Finished difference Result 560 states and 3946 transitions. [2019-01-08 14:39:09,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:09,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2019-01-08 14:39:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:09,061 INFO L225 Difference]: With dead ends: 560 [2019-01-08 14:39:09,061 INFO L226 Difference]: Without dead ends: 557 [2019-01-08 14:39:09,062 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:39:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-01-08 14:39:09,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 522. [2019-01-08 14:39:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2019-01-08 14:39:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 3906 transitions. [2019-01-08 14:39:09,231 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 3906 transitions. Word has length 5 [2019-01-08 14:39:09,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:09,231 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 3906 transitions. [2019-01-08 14:39:09,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:39:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 3906 transitions. [2019-01-08 14:39:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:09,233 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:09,233 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:09,233 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 905114198, now seen corresponding path program 1 times [2019-01-08 14:39:09,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:09,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:09,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:09,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:09,236 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:09,287 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 14:39:09,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:09,287 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:09,288 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:09,288 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [34], [36], [37] [2019-01-08 14:39:09,288 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:09,288 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:09,466 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:09,466 INFO L272 AbstractInterpreter]: Visited 6 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:39:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:09,466 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:09,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:09,466 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:09,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:09,477 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:09,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:09,512 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 14:39:09,514 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 14:39:09,523 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 29 treesize of output 35 [2019-01-08 14:39:09,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,539 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 14:39:09,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,559 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 14:39:09,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,580 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 14:39:09,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:39:09,600 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,648 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,690 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,719 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,740 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,761 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,782 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 63 [2019-01-08 14:39:09,823 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 59 treesize of output 48 [2019-01-08 14:39:09,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,856 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 41 treesize of output 62 [2019-01-08 14:39:09,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:39:09,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:09,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:39:09,973 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:09,994 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:10,017 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:10,040 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:10,064 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:10,107 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 14:39:10,107 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 8 variables, input treesize:84, output treesize:88 [2019-01-08 14:39:10,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:10,137 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 83 [2019-01-08 14:39:10,138 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:10,175 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 14:39:10,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:63 [2019-01-08 14:39:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:10,192 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:10,297 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 14:39:10,331 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-08 14:39:10,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-08 14:39:10,331 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-08 14:39:10,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-08 14:39:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-08 14:39:10,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:39:10,332 INFO L87 Difference]: Start difference. First operand 522 states and 3906 transitions. Second operand 4 states. [2019-01-08 14:39:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:10,887 INFO L93 Difference]: Finished difference Result 806 states and 6051 transitions. [2019-01-08 14:39:10,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-08 14:39:10,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-01-08 14:39:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:10,891 INFO L225 Difference]: With dead ends: 806 [2019-01-08 14:39:10,891 INFO L226 Difference]: Without dead ends: 802 [2019-01-08 14:39:10,892 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-08 14:39:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2019-01-08 14:39:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 783. [2019-01-08 14:39:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2019-01-08 14:39:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 6028 transitions. [2019-01-08 14:39:11,238 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 6028 transitions. Word has length 6 [2019-01-08 14:39:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:11,238 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 6028 transitions. [2019-01-08 14:39:11,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-08 14:39:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 6028 transitions. [2019-01-08 14:39:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:11,239 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:11,240 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:39:11,240 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash 904695138, now seen corresponding path program 2 times [2019-01-08 14:39:11,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:11,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:11,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:11,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:11,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:11,489 WARN L181 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2019-01-08 14:39:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:39:11,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:11,533 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:11,533 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:11,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:11,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:11,534 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:11,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:39:11,542 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:39:11,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-01-08 14:39:11,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:39:11,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:11,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:11,582 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 14:39:11,590 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 29 treesize of output 35 [2019-01-08 14:39:11,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,600 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:39:11,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,612 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 14:39:11,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:39:11,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 112 [2019-01-08 14:39:11,639 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,693 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,724 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,748 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,766 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,784 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,799 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:11,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 83 [2019-01-08 14:39:11,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2019-01-08 14:39:11,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 76 [2019-01-08 14:39:11,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 83 [2019-01-08 14:39:11,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:11,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 97 [2019-01-08 14:39:12,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 77 [2019-01-08 14:39:12,150 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,184 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,218 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,254 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,293 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,333 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,396 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:12,396 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:107, output treesize:112 [2019-01-08 14:39:12,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 112 [2019-01-08 14:39:12,421 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,479 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 14:39:12,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:122, output treesize:88 [2019-01-08 14:39:12,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:12,513 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 124 [2019-01-08 14:39:12,513 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:12,579 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 14:39:12,579 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:100, output treesize:88 [2019-01-08 14:39:12,601 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 14:39:12,602 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:12,619 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 14:39:12,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:12,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2019-01-08 14:39:12,638 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:12,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-01-08 14:39:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-01-08 14:39:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:39:12,639 INFO L87 Difference]: Start difference. First operand 783 states and 6028 transitions. Second operand 7 states. [2019-01-08 14:39:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:13,339 INFO L93 Difference]: Finished difference Result 802 states and 6046 transitions. [2019-01-08 14:39:13,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:39:13,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-01-08 14:39:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:13,344 INFO L225 Difference]: With dead ends: 802 [2019-01-08 14:39:13,344 INFO L226 Difference]: Without dead ends: 801 [2019-01-08 14:39:13,345 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:39:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2019-01-08 14:39:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 783. [2019-01-08 14:39:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2019-01-08 14:39:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 6028 transitions. [2019-01-08 14:39:13,667 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 6028 transitions. Word has length 6 [2019-01-08 14:39:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:13,667 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 6028 transitions. [2019-01-08 14:39:13,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-01-08 14:39:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 6028 transitions. [2019-01-08 14:39:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:13,670 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:13,670 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:39:13,670 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash 904669900, now seen corresponding path program 1 times [2019-01-08 14:39:13,671 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:13,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:13,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:39:13,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:13,672 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:13,833 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 13 [2019-01-08 14:39:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:39:13,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:13,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:13,878 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:13,878 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [26], [31] [2019-01-08 14:39:13,882 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:13,882 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:14,169 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:14,169 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:14,169 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:14,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:14,169 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:14,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:14,178 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:14,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:14,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 14:39:14,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:39:14,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,265 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 14:39:14,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,275 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 14:39:14,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,289 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 14:39:14,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:39:14,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,312 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 14:39:14,313 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,370 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,403 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,429 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,450 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,465 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,480 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:14,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,523 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:14,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:14,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:14,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,766 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:14,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:14,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:14,999 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-08 14:39:15,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:15,014 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,053 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,093 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,134 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,176 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,218 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,285 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 14:39:15,286 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:15,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:39:15,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,384 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:15,385 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:15,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,423 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 132 [2019-01-08 14:39:15,424 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,497 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 14:39:15,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:96 [2019-01-08 14:39:15,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,533 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 14:39:15,534 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,605 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 14:39:15,605 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:39:15,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:15,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 164 [2019-01-08 14:39:15,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:15,731 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 14:39:15,731 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:62 [2019-01-08 14:39:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:15,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:15,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:15,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-08 14:39:15,824 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:15,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:39:15,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:39:15,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:39:15,825 INFO L87 Difference]: Start difference. First operand 783 states and 6028 transitions. Second operand 11 states. [2019-01-08 14:39:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:17,311 INFO L93 Difference]: Finished difference Result 956 states and 7015 transitions. [2019-01-08 14:39:17,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:39:17,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:39:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:17,319 INFO L225 Difference]: With dead ends: 956 [2019-01-08 14:39:17,319 INFO L226 Difference]: Without dead ends: 954 [2019-01-08 14:39:17,319 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:39:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2019-01-08 14:39:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 808. [2019-01-08 14:39:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2019-01-08 14:39:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 6214 transitions. [2019-01-08 14:39:17,642 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 6214 transitions. Word has length 6 [2019-01-08 14:39:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:17,642 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 6214 transitions. [2019-01-08 14:39:17,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:39:17,642 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 6214 transitions. [2019-01-08 14:39:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:17,644 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:17,644 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:39:17,644 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash 904323940, now seen corresponding path program 2 times [2019-01-08 14:39:17,644 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:17,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:17,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:17,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:17,645 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:39:17,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:17,848 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:17,848 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:17,848 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:17,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:17,848 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:17,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:39:17,860 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:39:17,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:39:17,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:39:17,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:17,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:17,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:17,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:17,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:17,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:18,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:18,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:18,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:18,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:18,282 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,329 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,376 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,428 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,474 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,528 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,586 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:18,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 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 14:39:18,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 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 14:39:18,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:18,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:39:18,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:39:18,605 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 14:39:18,606 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,661 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,692 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,716 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,736 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,752 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,766 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,857 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 14:39:18,858 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:18,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:18,889 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 14:39:18,890 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:18,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:18,956 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:19,228 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-01-08 14:39:19,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,310 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 14:39:19,310 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:19,378 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:19,379 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:39:19,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 152 [2019-01-08 14:39:19,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:19,496 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 14:39:19,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:76 [2019-01-08 14:39:19,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:19,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 164 [2019-01-08 14:39:19,616 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:19,694 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 14:39:19,694 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:62 [2019-01-08 14:39:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:19,722 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:19,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:19,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2019-01-08 14:39:19,819 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:19,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:39:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:39:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:39:19,820 INFO L87 Difference]: Start difference. First operand 808 states and 6214 transitions. Second operand 11 states. [2019-01-08 14:39:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:21,155 INFO L93 Difference]: Finished difference Result 1087 states and 7943 transitions. [2019-01-08 14:39:21,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:39:21,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:39:21,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:21,160 INFO L225 Difference]: With dead ends: 1087 [2019-01-08 14:39:21,160 INFO L226 Difference]: Without dead ends: 1084 [2019-01-08 14:39:21,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2019-01-08 14:39:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 849. [2019-01-08 14:39:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 849 states. [2019-01-08 14:39:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 6541 transitions. [2019-01-08 14:39:21,494 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 6541 transitions. Word has length 6 [2019-01-08 14:39:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:21,494 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 6541 transitions. [2019-01-08 14:39:21,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:39:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 6541 transitions. [2019-01-08 14:39:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:21,496 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:21,496 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:21,496 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash 904327972, now seen corresponding path program 1 times [2019-01-08 14:39:21,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:21,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:21,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:39:21,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:21,497 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:21,656 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:39:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:39:21,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:21,937 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:21,937 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:21,937 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [32], [33] [2019-01-08 14:39:21,938 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:21,938 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:22,278 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:22,278 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:22,278 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:22,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:22,278 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:22,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:22,288 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:22,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:22,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,324 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:22,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:22,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:22,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:22,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:22,550 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,576 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,603 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,630 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,690 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:22,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:22,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:39:22,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:39:22,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:39:22,742 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 14:39:22,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:22,751 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,789 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,820 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,843 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,860 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,876 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,890 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:22,940 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:22,940 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:22,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:22,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:39:22,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:23,040 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:23,041 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:23,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:39:23,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:23,128 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:23,128 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:23,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:23,174 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:23,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:39:23,176 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:23,227 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 14:39:23,228 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:39:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:23,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:23,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:23,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:39:23,368 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:23,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:39:23,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:39:23,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:39:23,369 INFO L87 Difference]: Start difference. First operand 849 states and 6541 transitions. Second operand 10 states. [2019-01-08 14:39:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:24,379 INFO L93 Difference]: Finished difference Result 942 states and 6912 transitions. [2019-01-08 14:39:24,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:24,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:39:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:24,384 INFO L225 Difference]: With dead ends: 942 [2019-01-08 14:39:24,385 INFO L226 Difference]: Without dead ends: 940 [2019-01-08 14:39:24,385 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2019-01-08 14:39:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 891. [2019-01-08 14:39:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 891 states. [2019-01-08 14:39:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 6849 transitions. [2019-01-08 14:39:24,726 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 6849 transitions. Word has length 6 [2019-01-08 14:39:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:24,727 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 6849 transitions. [2019-01-08 14:39:24,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:39:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 6849 transitions. [2019-01-08 14:39:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:24,728 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:24,728 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:24,729 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash 904333738, now seen corresponding path program 1 times [2019-01-08 14:39:24,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:24,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:24,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:24,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:24,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:39:24,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:24,845 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:24,845 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:24,845 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [32], [33] [2019-01-08 14:39:24,847 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:24,847 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:25,193 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:25,193 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:25,194 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:25,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:25,194 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:25,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:25,205 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:25,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:25,248 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 14:39:25,254 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 14:39:25,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,260 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 14:39:25,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:39:25,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,282 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 14:39:25,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,296 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 14:39:25,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,307 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:39:25,308 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,367 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,400 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,426 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,447 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,466 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,482 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:25,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:25,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:25,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:25,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,775 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:25,903 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-08 14:39:25,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:25,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:25,918 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,956 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:25,996 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,038 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,079 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,121 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,189 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:26,189 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:26,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,230 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 14:39:26,230 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,297 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:26,297 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:26,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,338 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 14:39:26,339 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,423 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 14:39:26,424 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:39:26,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:26,465 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:26,466 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 158 [2019-01-08 14:39:26,467 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:26,543 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 14:39:26,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:39:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:26,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:26,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:26,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:39:26,626 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:26,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:39:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:39:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:39:26,627 INFO L87 Difference]: Start difference. First operand 891 states and 6849 transitions. Second operand 9 states. [2019-01-08 14:39:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:27,765 INFO L93 Difference]: Finished difference Result 959 states and 7083 transitions. [2019-01-08 14:39:27,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:27,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:39:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:27,769 INFO L225 Difference]: With dead ends: 959 [2019-01-08 14:39:27,770 INFO L226 Difference]: Without dead ends: 951 [2019-01-08 14:39:27,770 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:39:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2019-01-08 14:39:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 909. [2019-01-08 14:39:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 909 states. [2019-01-08 14:39:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 7020 transitions. [2019-01-08 14:39:28,176 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 7020 transitions. Word has length 6 [2019-01-08 14:39:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:28,177 INFO L480 AbstractCegarLoop]: Abstraction has 909 states and 7020 transitions. [2019-01-08 14:39:28,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:39:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 7020 transitions. [2019-01-08 14:39:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:28,179 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:28,179 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:28,179 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash 904320284, now seen corresponding path program 1 times [2019-01-08 14:39:28,180 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:28,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:28,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:28,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:28,180 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:39:28,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:28,257 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:28,257 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:28,257 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [32], [33] [2019-01-08 14:39:28,258 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:28,258 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:28,561 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:28,561 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:28,562 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:28,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:28,562 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:28,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:28,571 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:28,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:28,608 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 14:39:28,611 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 14:39:28,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,618 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 14:39:28,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:28,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,638 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 14:39:28,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,652 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 14:39:28,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:28,669 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,710 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,742 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,768 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,786 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,801 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,815 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:28,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:28,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:28,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:28,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:28,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:29,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:29,062 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,087 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,112 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,140 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,168 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:29,219 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:29,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:39:29,319 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,362 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:29,363 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:29,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:39:29,402 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:29,451 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:29,476 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:29,491 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:29,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:39:29,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:29,544 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 14:39:29,544 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:39:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:29,570 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:29,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:29,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:39:29,625 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:29,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:39:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:39:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:39:29,626 INFO L87 Difference]: Start difference. First operand 909 states and 7020 transitions. Second operand 9 states. [2019-01-08 14:39:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:30,598 INFO L93 Difference]: Finished difference Result 973 states and 7237 transitions. [2019-01-08 14:39:30,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:30,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:39:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:30,603 INFO L225 Difference]: With dead ends: 973 [2019-01-08 14:39:30,603 INFO L226 Difference]: Without dead ends: 972 [2019-01-08 14:39:30,603 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:39:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2019-01-08 14:39:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 929. [2019-01-08 14:39:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2019-01-08 14:39:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 7180 transitions. [2019-01-08 14:39:31,036 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 7180 transitions. Word has length 6 [2019-01-08 14:39:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:31,036 INFO L480 AbstractCegarLoop]: Abstraction has 929 states and 7180 transitions. [2019-01-08 14:39:31,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:39:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 7180 transitions. [2019-01-08 14:39:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:31,038 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:31,038 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:31,038 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:31,039 INFO L82 PathProgramCache]: Analyzing trace with hash 904792908, now seen corresponding path program 1 times [2019-01-08 14:39:31,039 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:31,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:31,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:31,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:31,040 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:31,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:31,127 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:31,127 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:31,127 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [26], [31] [2019-01-08 14:39:31,128 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:31,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:31,699 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:31,699 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:39:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:31,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:31,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:31,700 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:31,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:31,718 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:31,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:31,923 WARN L181 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:39:31,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:31,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:32,376 WARN L181 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-01-08 14:39:32,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:32,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:32,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:32,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:32,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:32,617 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:32,655 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:32,690 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:32,724 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:32,765 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:32,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:32,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:32,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:39:32,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:39:32,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:39:32,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:39:32,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:32,835 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:33,377 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:33,772 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:34,072 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:34,335 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:34,539 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:34,731 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:34,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:34,828 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:34,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:39:34,908 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:34,951 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:34,951 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:34,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:34,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:39:34,997 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:35,054 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:35,055 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:35,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,123 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:35,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:39:35,127 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:35,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:35,190 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:39:35,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,248 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:35,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:35,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-01-08 14:39:35,251 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:35,339 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 14:39:35,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:39:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:35,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:35,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:35,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:39:35,760 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:35,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:39:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:39:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:35,761 INFO L87 Difference]: Start difference. First operand 929 states and 7180 transitions. Second operand 12 states. [2019-01-08 14:39:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:39,046 INFO L93 Difference]: Finished difference Result 1006 states and 7394 transitions. [2019-01-08 14:39:39,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:39:39,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:39:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:39,052 INFO L225 Difference]: With dead ends: 1006 [2019-01-08 14:39:39,052 INFO L226 Difference]: Without dead ends: 1004 [2019-01-08 14:39:39,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:39:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2019-01-08 14:39:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 890. [2019-01-08 14:39:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-01-08 14:39:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 6868 transitions. [2019-01-08 14:39:39,463 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 6868 transitions. Word has length 6 [2019-01-08 14:39:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:39,463 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 6868 transitions. [2019-01-08 14:39:39,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:39:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 6868 transitions. [2019-01-08 14:39:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:39,465 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:39,465 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:39,465 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash 904808472, now seen corresponding path program 1 times [2019-01-08 14:39:39,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:39,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:39,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:39,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:39,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:39,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:39,565 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:39,566 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:39,566 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [32], [33] [2019-01-08 14:39:39,566 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:39,566 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:39,854 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:39,854 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:39,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:39,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:39,855 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:39,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:39,863 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:39,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:39,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:39,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:39,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:39,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:39,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:40,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:40,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:40,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:40,189 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,238 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,284 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,329 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,373 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 14:39:40,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:40,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:39:40,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:39:40,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:39:40,434 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 14:39:40,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:40,444 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,483 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,514 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,537 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,556 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,571 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,586 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:40,636 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:40,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:39:40,697 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:40,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:40,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:39:40,779 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,826 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:40,827 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:40,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,862 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:40,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:40,864 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:39:40,864 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:40,915 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:40,916 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:39:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:40,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:41,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:41,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:39:41,002 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:41,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:39:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:39:41,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:39:41,003 INFO L87 Difference]: Start difference. First operand 890 states and 6868 transitions. Second operand 10 states. [2019-01-08 14:39:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:42,177 INFO L93 Difference]: Finished difference Result 959 states and 7078 transitions. [2019-01-08 14:39:42,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:42,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:39:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:42,182 INFO L225 Difference]: With dead ends: 959 [2019-01-08 14:39:42,182 INFO L226 Difference]: Without dead ends: 958 [2019-01-08 14:39:42,182 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2019-01-08 14:39:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 910. [2019-01-08 14:39:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-01-08 14:39:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 7028 transitions. [2019-01-08 14:39:42,616 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 7028 transitions. Word has length 6 [2019-01-08 14:39:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:42,616 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 7028 transitions. [2019-01-08 14:39:42,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:39:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 7028 transitions. [2019-01-08 14:39:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:42,619 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:42,619 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:42,619 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash 904808346, now seen corresponding path program 1 times [2019-01-08 14:39:42,619 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:42,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:42,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:42,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:42,620 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:42,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:42,836 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:42,836 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:42,837 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [28], [31] [2019-01-08 14:39:42,838 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:42,838 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:43,249 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:43,249 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:39:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:43,249 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:43,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:43,250 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:43,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:43,258 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:43,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:43,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:43,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:43,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,394 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:43,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:43,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:43,529 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,557 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,583 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,609 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,637 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:43,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:43,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 14:39:43,683 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:43,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:39:43,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:39:43,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:43,700 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,756 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,786 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,810 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,828 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,844 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,859 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:43,909 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:43,909 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:43,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:43,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:39:43,967 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:39:44,123 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:39:44,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:150 [2019-01-08 14:39:44,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,212 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 83 treesize of output 129 [2019-01-08 14:39:44,213 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:44,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,357 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 88 treesize of output 118 [2019-01-08 14:39:44,358 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-08 14:39:44,550 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2019-01-08 14:39:44,551 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:172, output treesize:177 [2019-01-08 14:39:44,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,653 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:44,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 153 [2019-01-08 14:39:44,665 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:39:44,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:44,990 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:44,991 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 67 treesize of output 124 [2019-01-08 14:39:44,991 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:45,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,184 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:45,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,187 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 67 treesize of output 130 [2019-01-08 14:39:45,188 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:45,404 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 17 dim-0 vars, and 4 xjuncts. [2019-01-08 14:39:45,405 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:207, output treesize:196 [2019-01-08 14:39:45,539 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2019-01-08 14:39:45,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,582 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 61 treesize of output 127 [2019-01-08 14:39:45,583 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:45,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,739 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:45,740 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 61 treesize of output 129 [2019-01-08 14:39:45,741 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:45,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,888 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:45,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:45,913 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 66 treesize of output 144 [2019-01-08 14:39:45,917 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 8 xjuncts. [2019-01-08 14:39:46,304 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 3 dim-1 vars, End of recursive call: 31 dim-0 vars, and 6 xjuncts. [2019-01-08 14:39:46,305 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 19 variables, input treesize:189, output treesize:310 [2019-01-08 14:39:46,565 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 133 [2019-01-08 14:39:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:46,568 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:46,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:46,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:39:46,683 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:46,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:39:46,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:39:46,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:39:46,684 INFO L87 Difference]: Start difference. First operand 910 states and 7028 transitions. Second operand 12 states. [2019-01-08 14:39:46,942 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2019-01-08 14:39:47,210 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 103 [2019-01-08 14:39:47,598 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2019-01-08 14:39:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:48,885 INFO L93 Difference]: Finished difference Result 1033 states and 7604 transitions. [2019-01-08 14:39:48,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:39:48,886 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:39:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:48,890 INFO L225 Difference]: With dead ends: 1033 [2019-01-08 14:39:48,890 INFO L226 Difference]: Without dead ends: 1032 [2019-01-08 14:39:48,891 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:39:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2019-01-08 14:39:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 910. [2019-01-08 14:39:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-01-08 14:39:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 7028 transitions. [2019-01-08 14:39:49,296 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 7028 transitions. Word has length 6 [2019-01-08 14:39:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:49,296 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 7028 transitions. [2019-01-08 14:39:49,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:39:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 7028 transitions. [2019-01-08 14:39:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:49,298 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:49,298 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:49,299 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 904810394, now seen corresponding path program 1 times [2019-01-08 14:39:49,299 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:49,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:49,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:49,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:49,300 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:49,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:49,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:49,366 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:49,366 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [32], [33] [2019-01-08 14:39:49,368 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:49,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:49,711 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:49,711 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:49,712 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:49,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:49,712 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:49,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:49,722 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:49,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:49,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:49,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,819 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:49,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:49,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:49,940 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:50,060 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-08 14:39:50,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,072 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:50,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:50,178 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,220 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,257 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,300 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,343 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,399 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:39:50,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:50,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:39:50,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:50,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:39:50,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 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 14:39:50,500 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 14:39:50,500 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,565 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,598 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,621 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,643 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,660 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,673 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,744 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:50,744 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:50,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,779 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 14:39:50,780 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,843 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:50,843 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:50,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:50,883 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 14:39:50,884 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:50,954 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 14:39:50,954 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:39:51,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:51,018 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:51,019 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 152 [2019-01-08 14:39:51,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:51,091 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 14:39:51,092 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:39:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:51,120 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:51,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:51,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:39:51,176 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:51,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:39:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:39:51,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:39:51,177 INFO L87 Difference]: Start difference. First operand 910 states and 7028 transitions. Second operand 10 states. [2019-01-08 14:39:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:52,357 INFO L93 Difference]: Finished difference Result 975 states and 7194 transitions. [2019-01-08 14:39:52,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:52,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:39:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:52,362 INFO L225 Difference]: With dead ends: 975 [2019-01-08 14:39:52,362 INFO L226 Difference]: Without dead ends: 971 [2019-01-08 14:39:52,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2019-01-08 14:39:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 926. [2019-01-08 14:39:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2019-01-08 14:39:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 7136 transitions. [2019-01-08 14:39:52,805 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 7136 transitions. Word has length 6 [2019-01-08 14:39:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:52,805 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 7136 transitions. [2019-01-08 14:39:52,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:39:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 7136 transitions. [2019-01-08 14:39:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:52,807 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:52,807 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:52,807 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash 904810206, now seen corresponding path program 2 times [2019-01-08 14:39:52,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:52,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:52,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:52,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:52,808 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:52,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:52,951 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:52,951 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:39:52,951 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:39:52,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:52,951 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:52,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:39:52,961 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:39:52,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:39:52,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:39:52,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:52,996 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 14:39:53,000 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 14:39:53,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,006 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 14:39:53,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,014 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 14:39:53,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,021 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 14:39:53,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:39:53,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,043 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 14:39:53,044 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,102 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,136 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,164 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,186 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,203 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,220 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:39:53,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:39:53,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:39:53,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:39:53,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:39:53,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,651 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:39:53,652 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,692 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,732 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,774 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,815 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,858 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:53,926 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:53,926 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:39:53,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:53,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:39:53,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:54,042 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:54,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:39:54,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,092 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 14:39:54,093 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:54,162 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:54,162 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:39:54,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,216 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:54,217 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 152 [2019-01-08 14:39:54,218 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:54,292 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 14:39:54,292 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:39:54,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,337 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:54,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:54,339 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 147 [2019-01-08 14:39:54,340 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:54,409 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 14:39:54,410 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:76, output treesize:56 [2019-01-08 14:39:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:54,438 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:54,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:54,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:39:54,524 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:54,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:39:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:39:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:54,525 INFO L87 Difference]: Start difference. First operand 926 states and 7136 transitions. Second operand 12 states. [2019-01-08 14:39:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:56,031 INFO L93 Difference]: Finished difference Result 1013 states and 7438 transitions. [2019-01-08 14:39:56,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:39:56,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:39:56,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:56,037 INFO L225 Difference]: With dead ends: 1013 [2019-01-08 14:39:56,037 INFO L226 Difference]: Without dead ends: 1011 [2019-01-08 14:39:56,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:39:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2019-01-08 14:39:56,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 937. [2019-01-08 14:39:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2019-01-08 14:39:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 7224 transitions. [2019-01-08 14:39:56,497 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 7224 transitions. Word has length 6 [2019-01-08 14:39:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:56,497 INFO L480 AbstractCegarLoop]: Abstraction has 937 states and 7224 transitions. [2019-01-08 14:39:56,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:39:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 7224 transitions. [2019-01-08 14:39:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:56,499 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:56,499 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:56,499 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:56,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash 904796940, now seen corresponding path program 1 times [2019-01-08 14:39:56,500 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:56,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:56,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:39:56,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:56,501 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:56,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:56,598 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:56,598 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:56,598 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [32], [33] [2019-01-08 14:39:56,599 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:56,599 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:39:56,925 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:39:56,926 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:39:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:56,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:39:56,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:56,926 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:39:56,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:56,934 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:39:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:56,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:39:56,975 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 14:39:56,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:39:56,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:56,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:56,986 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 14:39:56,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:56,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:56,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:56,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:39:57,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,006 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 14:39:57,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,022 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 14:39:57,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:39:57,034 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,078 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,112 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,136 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,155 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,171 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,184 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:39:57,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:39:57,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:39:57,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:39:57,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:39:57,440 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,467 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,493 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,520 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,548 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,598 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:57,598 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:39:57,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:39:57,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,704 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:57,705 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:39:57,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:39:57,742 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,789 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:39:57,790 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:39:57,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:39:57,834 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:39:57,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:39:57,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:39:57,886 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 14:39:57,887 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:39:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:57,962 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:39:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:58,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:39:58,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:39:58,023 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:39:58,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:39:58,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:39:58,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:39:58,023 INFO L87 Difference]: Start difference. First operand 937 states and 7224 transitions. Second operand 10 states. [2019-01-08 14:39:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:39:58,992 INFO L93 Difference]: Finished difference Result 996 states and 7376 transitions. [2019-01-08 14:39:58,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:39:58,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:39:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:39:58,997 INFO L225 Difference]: With dead ends: 996 [2019-01-08 14:39:58,997 INFO L226 Difference]: Without dead ends: 995 [2019-01-08 14:39:58,998 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:39:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2019-01-08 14:39:59,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 949. [2019-01-08 14:39:59,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 949 states. [2019-01-08 14:39:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 7320 transitions. [2019-01-08 14:39:59,507 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 7320 transitions. Word has length 6 [2019-01-08 14:39:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:39:59,507 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 7320 transitions. [2019-01-08 14:39:59,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:39:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 7320 transitions. [2019-01-08 14:39:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:39:59,509 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:39:59,509 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:39:59,509 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:39:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:39:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash 904796752, now seen corresponding path program 1 times [2019-01-08 14:39:59,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:39:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:59,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:39:59,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:39:59,510 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:39:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:39:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:39:59,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:39:59,622 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:39:59,622 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:39:59,622 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [26], [31] [2019-01-08 14:39:59,623 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:39:59,623 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:00,027 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:00,027 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:40:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:00,027 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:00,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:00,027 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:00,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:00,035 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:00,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:00,069 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 14:40:00,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:40:00,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,084 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 14:40:00,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,096 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 14:40:00,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:40:00,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,124 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 14:40:00,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:00,134 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,175 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,210 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,233 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,254 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,270 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,286 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:00,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,366 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:00,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:00,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:00,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:00,542 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,569 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,596 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,631 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,669 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:00,729 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:00,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:40:00,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,870 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:00,870 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:00,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:00,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:40:00,936 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:00,994 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:00,994 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:40:01,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,058 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:01,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:40:01,059 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:01,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:01,109 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:40:01,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,154 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:01,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:01,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:40:01,157 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:01,208 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 14:40:01,208 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:40:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:01,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:01,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:01,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:40:01,319 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:01,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:40:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:40:01,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:40:01,319 INFO L87 Difference]: Start difference. First operand 949 states and 7320 transitions. Second operand 12 states. [2019-01-08 14:40:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:02,723 INFO L93 Difference]: Finished difference Result 1033 states and 7605 transitions. [2019-01-08 14:40:02,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:40:02,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:40:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:02,729 INFO L225 Difference]: With dead ends: 1033 [2019-01-08 14:40:02,729 INFO L226 Difference]: Without dead ends: 1031 [2019-01-08 14:40:02,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:40:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2019-01-08 14:40:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 975. [2019-01-08 14:40:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-01-08 14:40:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 7528 transitions. [2019-01-08 14:40:03,234 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 7528 transitions. Word has length 6 [2019-01-08 14:40:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:03,234 INFO L480 AbstractCegarLoop]: Abstraction has 975 states and 7528 transitions. [2019-01-08 14:40:03,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:40:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 7528 transitions. [2019-01-08 14:40:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:03,236 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:03,236 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:03,236 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 904456810, now seen corresponding path program 1 times [2019-01-08 14:40:03,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:03,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:03,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:03,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:03,237 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:40:03,296 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:03,297 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:03,297 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:03,297 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [34], [35] [2019-01-08 14:40:03,299 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:03,299 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:03,517 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:03,517 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:40:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:03,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:03,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:03,518 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:03,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:03,525 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:03,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:03,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 14:40:03,563 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 14:40:03,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,570 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 14:40:03,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,584 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 14:40:03,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,597 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 14:40:03,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,611 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 14:40:03,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:03,620 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,661 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,694 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,719 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,740 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,757 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,771 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:03,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:03,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:03,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:03,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:03,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:04,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:04,009 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,035 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,060 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,086 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,112 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,160 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 14:40:04,160 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:04,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:40:04,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,251 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:04,252 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:04,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:04,280 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:04,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:40:04,282 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:04,328 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 14:40:04,328 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2019-01-08 14:40:04,350 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 14:40:04,350 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:04,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:04,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:40:04,390 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:04,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:40:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:40:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:40:04,391 INFO L87 Difference]: Start difference. First operand 975 states and 7528 transitions. Second operand 8 states. [2019-01-08 14:40:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:05,228 INFO L93 Difference]: Finished difference Result 1002 states and 7555 transitions. [2019-01-08 14:40:05,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:40:05,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:40:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:05,232 INFO L225 Difference]: With dead ends: 1002 [2019-01-08 14:40:05,233 INFO L226 Difference]: Without dead ends: 1001 [2019-01-08 14:40:05,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:40:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2019-01-08 14:40:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 975. [2019-01-08 14:40:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-01-08 14:40:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 7528 transitions. [2019-01-08 14:40:05,713 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 7528 transitions. Word has length 6 [2019-01-08 14:40:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:05,713 INFO L480 AbstractCegarLoop]: Abstraction has 975 states and 7528 transitions. [2019-01-08 14:40:05,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:40:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 7528 transitions. [2019-01-08 14:40:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:05,715 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:05,716 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:05,716 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 904431572, now seen corresponding path program 1 times [2019-01-08 14:40:05,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:05,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:05,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:05,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:05,717 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:05,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:05,936 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:05,936 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:05,937 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [26], [31] [2019-01-08 14:40:05,937 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:05,937 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:06,385 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:06,385 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:40:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:06,385 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:06,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:06,386 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:06,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:06,394 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:06,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:06,432 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 14:40:06,437 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 14:40:06,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:40:06,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,454 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 14:40:06,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,463 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 14:40:06,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,472 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 14:40:06,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:06,483 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,525 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,558 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,585 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,605 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,623 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,640 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:06,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:06,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,761 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:06,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:06,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:06,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:06,892 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,918 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,945 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,972 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:06,999 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:07,049 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:07,049 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:07,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:40:07,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:07,158 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:07,158 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:07,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,194 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:07,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:40:07,196 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:07,241 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:07,241 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-08 14:40:07,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-08 14:40:07,281 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:07,329 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:07,330 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2019-01-08 14:40:07,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,370 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:07,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:07,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-08 14:40:07,372 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:07,421 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 14:40:07,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:40:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:07,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:07,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:07,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2019-01-08 14:40:07,501 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:07,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:40:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:40:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:40:07,502 INFO L87 Difference]: Start difference. First operand 975 states and 7528 transitions. Second operand 12 states. [2019-01-08 14:40:07,912 WARN L181 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2019-01-08 14:40:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:09,051 INFO L93 Difference]: Finished difference Result 1224 states and 9054 transitions. [2019-01-08 14:40:09,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:40:09,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:40:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:09,058 INFO L225 Difference]: With dead ends: 1224 [2019-01-08 14:40:09,058 INFO L226 Difference]: Without dead ends: 1222 [2019-01-08 14:40:09,058 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:40:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2019-01-08 14:40:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1073. [2019-01-08 14:40:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2019-01-08 14:40:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 8311 transitions. [2019-01-08 14:40:09,583 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 8311 transitions. Word has length 6 [2019-01-08 14:40:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:09,584 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 8311 transitions. [2019-01-08 14:40:09,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:40:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 8311 transitions. [2019-01-08 14:40:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:09,586 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:09,586 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:09,586 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash 904447136, now seen corresponding path program 1 times [2019-01-08 14:40:09,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:09,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:09,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:09,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:09,587 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:09,877 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2019-01-08 14:40:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:10,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:10,013 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:10,013 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:10,014 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [32], [33] [2019-01-08 14:40:10,014 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:10,015 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:10,344 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:10,344 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:40:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:10,344 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:10,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:10,345 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:10,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:10,354 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:10,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:10,390 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 14:40:10,393 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 14:40:10,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,401 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 14:40:10,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,410 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 14:40:10,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,423 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 14:40:10,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,440 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 14:40:10,457 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:10,458 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,501 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,534 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,561 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,583 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,601 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,618 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:10,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,693 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:10,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:10,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:10,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:10,884 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:10,884 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,925 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,958 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:10,988 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:11,016 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:11,072 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 14:40:11,072 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:11,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:40:11,134 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:11,194 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:11,194 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:11,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,249 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:11,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:40:11,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:11,311 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:11,311 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-08 14:40:11,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:11,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 107 [2019-01-08 14:40:11,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:11,458 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 14:40:11,458 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2019-01-08 14:40:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:11,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:11,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:11,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2019-01-08 14:40:11,553 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:11,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:40:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:40:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:40:11,554 INFO L87 Difference]: Start difference. First operand 1073 states and 8311 transitions. Second operand 11 states. [2019-01-08 14:40:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:13,654 INFO L93 Difference]: Finished difference Result 1388 states and 10131 transitions. [2019-01-08 14:40:13,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-08 14:40:13,655 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:40:13,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:13,661 INFO L225 Difference]: With dead ends: 1388 [2019-01-08 14:40:13,661 INFO L226 Difference]: Without dead ends: 1386 [2019-01-08 14:40:13,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:40:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2019-01-08 14:40:14,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1170. [2019-01-08 14:40:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2019-01-08 14:40:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 9078 transitions. [2019-01-08 14:40:14,233 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 9078 transitions. Word has length 6 [2019-01-08 14:40:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:14,233 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 9078 transitions. [2019-01-08 14:40:14,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:40:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 9078 transitions. [2019-01-08 14:40:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:14,236 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:14,236 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:14,237 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash 904933466, now seen corresponding path program 1 times [2019-01-08 14:40:14,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:14,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:14,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:14,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:14,238 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:14,429 WARN L181 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-01-08 14:40:14,440 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 14:40:14,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:14,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:14,441 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:14,441 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [34], [35] [2019-01-08 14:40:14,442 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:14,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:14,695 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:14,695 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:40:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:14,695 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:14,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:14,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:14,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:14,703 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:14,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:14,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,748 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 57 treesize of output 63 [2019-01-08 14:40:14,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 48 [2019-01-08 14:40:14,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2019-01-08 14:40:14,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:40:14,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:14,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:40:14,925 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:14,955 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:14,988 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,321 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,542 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:40:15,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:40:15,596 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 14:40:15,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 14:40:15,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 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 14:40:15,611 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 14:40:15,621 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:40:15,622 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,655 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,682 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,702 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,718 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,734 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,748 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:15,792 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 14:40:15,793 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:84, output treesize:88 [2019-01-08 14:40:15,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:15,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 83 [2019-01-08 14:40:15,925 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:16,093 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:16,093 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:93, output treesize:63 [2019-01-08 14:40:16,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:16,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:16,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:16,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:16,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:16,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:16,130 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:16,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 98 [2019-01-08 14:40:16,131 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:16,171 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 14:40:16,171 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:75, output treesize:51 [2019-01-08 14:40:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:16,190 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:16,225 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 14:40:16,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:16,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:40:16,245 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:16,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:40:16,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:40:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:40:16,246 INFO L87 Difference]: Start difference. First operand 1170 states and 9078 transitions. Second operand 8 states. [2019-01-08 14:40:17,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:17,091 INFO L93 Difference]: Finished difference Result 1195 states and 9103 transitions. [2019-01-08 14:40:17,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:40:17,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:40:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:17,097 INFO L225 Difference]: With dead ends: 1195 [2019-01-08 14:40:17,097 INFO L226 Difference]: Without dead ends: 1194 [2019-01-08 14:40:17,097 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:40:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2019-01-08 14:40:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1170. [2019-01-08 14:40:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1170 states. [2019-01-08 14:40:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 9078 transitions. [2019-01-08 14:40:17,662 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 9078 transitions. Word has length 6 [2019-01-08 14:40:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:17,663 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 9078 transitions. [2019-01-08 14:40:17,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:40:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 9078 transitions. [2019-01-08 14:40:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:17,666 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:17,666 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:17,666 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash 904929558, now seen corresponding path program 1 times [2019-01-08 14:40:17,667 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:17,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:17,667 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:17,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:17,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:17,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:17,797 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [28], [32], [33] [2019-01-08 14:40:17,798 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:17,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:18,144 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:18,145 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:40:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:18,145 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:18,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:18,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:18,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:18,154 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:18,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:18,199 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 14:40:18,202 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 14:40:18,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:40:18,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,220 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 14:40:18,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:40:18,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:40:18,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,258 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 14:40:18,258 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,317 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,353 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,379 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,400 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,416 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,431 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:40:18,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:40:18,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:40:18,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:40:18,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:40:18,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:18,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:40:18,818 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,856 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,894 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,932 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:18,971 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:19,012 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:19,079 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:19,079 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:40:19,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,116 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 14:40:19,117 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:19,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:19,181 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:40:19,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,219 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:19,220 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 14:40:19,220 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:19,288 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 14:40:19,288 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:80 [2019-01-08 14:40:19,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:19,329 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 50 treesize of output 144 [2019-01-08 14:40:19,330 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:19,397 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 14:40:19,398 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:94, output treesize:68 [2019-01-08 14:40:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:19,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:19,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:19,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:40:19,483 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:19,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:40:19,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:40:19,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:40:19,484 INFO L87 Difference]: Start difference. First operand 1170 states and 9078 transitions. Second operand 10 states. [2019-01-08 14:40:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:20,653 INFO L93 Difference]: Finished difference Result 1234 states and 9256 transitions. [2019-01-08 14:40:20,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:40:20,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:40:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:20,660 INFO L225 Difference]: With dead ends: 1234 [2019-01-08 14:40:20,660 INFO L226 Difference]: Without dead ends: 1231 [2019-01-08 14:40:20,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:40:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2019-01-08 14:40:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1189. [2019-01-08 14:40:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2019-01-08 14:40:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 9209 transitions. [2019-01-08 14:40:21,290 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 9209 transitions. Word has length 6 [2019-01-08 14:40:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:21,290 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 9209 transitions. [2019-01-08 14:40:21,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:40:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 9209 transitions. [2019-01-08 14:40:21,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:21,292 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:21,293 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:21,293 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash 904928874, now seen corresponding path program 1 times [2019-01-08 14:40:21,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:21,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:21,294 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:21,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:21,382 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:21,382 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:21,382 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [26], [28], [31] [2019-01-08 14:40:21,383 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:21,383 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:21,787 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:21,787 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:40:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:21,787 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:21,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:21,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:21,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:21,796 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:21,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:21,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:21,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:21,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,936 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:21,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:21,995 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:22,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:22,067 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,095 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,123 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,151 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,178 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:40:22,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:40:22,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:40:22,222 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:40:22,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:40:22,228 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 14:40:22,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:22,236 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,274 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,304 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,328 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,347 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,363 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,377 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:22,427 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:22,428 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:22,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:40:22,493 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:40:22,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:40:22,651 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:150 [2019-01-08 14:40:22,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,737 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:22,746 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 88 treesize of output 119 [2019-01-08 14:40:22,748 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:40:22,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:22,960 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:22,960 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 126 [2019-01-08 14:40:22,961 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:23,105 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2019-01-08 14:40:23,106 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:172, output treesize:185 [2019-01-08 14:40:23,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 148 [2019-01-08 14:40:23,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2019-01-08 14:40:23,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,770 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:23,777 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:23,778 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 73 treesize of output 107 [2019-01-08 14:40:23,779 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:23,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2019-01-08 14:40:23,978 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:152, output treesize:346 [2019-01-08 14:40:24,286 WARN L181 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 129 [2019-01-08 14:40:24,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,308 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:24,309 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 61 treesize of output 129 [2019-01-08 14:40:24,309 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:24,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,498 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:24,499 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 61 treesize of output 126 [2019-01-08 14:40:24,499 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:24,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,674 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:24,675 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 83 treesize of output 120 [2019-01-08 14:40:24,676 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:24,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:24,844 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:24,845 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 61 treesize of output 138 [2019-01-08 14:40:24,846 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:24,989 INFO L267 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 4 dim-1 vars, End of recursive call: 20 dim-0 vars, and 4 xjuncts. [2019-01-08 14:40:24,989 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 24 variables, input treesize:267, output treesize:225 [2019-01-08 14:40:25,149 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 107 [2019-01-08 14:40:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:25,152 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:25,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:25,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:40:25,264 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:25,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:40:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:40:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:40:25,265 INFO L87 Difference]: Start difference. First operand 1189 states and 9209 transitions. Second operand 12 states. [2019-01-08 14:40:25,513 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2019-01-08 14:40:25,750 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 115 [2019-01-08 14:40:25,995 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 92 [2019-01-08 14:40:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:30,752 INFO L93 Difference]: Finished difference Result 1298 states and 9503 transitions. [2019-01-08 14:40:30,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:40:30,753 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:40:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:30,758 INFO L225 Difference]: With dead ends: 1298 [2019-01-08 14:40:30,759 INFO L226 Difference]: Without dead ends: 1297 [2019-01-08 14:40:30,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2019-01-08 14:40:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2019-01-08 14:40:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1166. [2019-01-08 14:40:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1166 states. [2019-01-08 14:40:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 9025 transitions. [2019-01-08 14:40:31,277 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 9025 transitions. Word has length 6 [2019-01-08 14:40:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:31,277 INFO L480 AbstractCegarLoop]: Abstraction has 1166 states and 9025 transitions. [2019-01-08 14:40:31,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:40:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 9025 transitions. [2019-01-08 14:40:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:31,279 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:31,279 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:31,280 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash 904915420, now seen corresponding path program 1 times [2019-01-08 14:40:31,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:31,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:31,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:31,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:31,281 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:31,431 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2019-01-08 14:40:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:31,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:31,576 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:31,576 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:31,576 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [26], [31] [2019-01-08 14:40:31,577 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:31,577 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:31,941 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:31,942 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:40:31,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:31,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:31,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:31,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:31,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:31,950 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:31,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:31,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:31,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:32,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:32,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:32,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:32,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,242 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:32,243 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,283 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,319 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,356 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,394 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:40:32,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:40:32,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:40:32,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:40:32,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:40:32,456 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 14:40:32,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:32,466 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,506 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,536 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,560 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,578 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,594 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,608 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:32,658 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:32,658 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:32,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:32,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:40:32,747 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:33,008 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:33,009 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:33,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,053 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:33,054 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:40:33,055 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:33,101 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:33,102 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:59 [2019-01-08 14:40:33,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2019-01-08 14:40:33,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:33,214 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:33,214 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2019-01-08 14:40:33,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,261 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:33,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:33,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2019-01-08 14:40:33,264 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:33,316 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 14:40:33,317 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2019-01-08 14:40:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:33,342 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:33,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:33,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:40:33,425 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:33,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:40:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:40:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:40:33,426 INFO L87 Difference]: Start difference. First operand 1166 states and 9025 transitions. Second operand 12 states. [2019-01-08 14:40:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:35,216 INFO L93 Difference]: Finished difference Result 1222 states and 9088 transitions. [2019-01-08 14:40:35,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:40:35,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:40:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:35,222 INFO L225 Difference]: With dead ends: 1222 [2019-01-08 14:40:35,222 INFO L226 Difference]: Without dead ends: 1221 [2019-01-08 14:40:35,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2019-01-08 14:40:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-01-08 14:40:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1122. [2019-01-08 14:40:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1122 states. [2019-01-08 14:40:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 8658 transitions. [2019-01-08 14:40:35,823 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 8658 transitions. Word has length 6 [2019-01-08 14:40:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:35,823 INFO L480 AbstractCegarLoop]: Abstraction has 1122 states and 8658 transitions. [2019-01-08 14:40:35,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:40:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 8658 transitions. [2019-01-08 14:40:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:35,826 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:35,826 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:35,827 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:35,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:35,827 INFO L82 PathProgramCache]: Analyzing trace with hash 904975686, now seen corresponding path program 1 times [2019-01-08 14:40:35,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:35,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:35,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:35,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:35,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:35,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:35,890 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:35,890 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:35,890 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [28], [32], [33] [2019-01-08 14:40:35,891 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:35,891 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:36,346 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:36,347 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:40:36,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:36,347 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:36,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:36,348 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:36,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:36,360 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:36,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:36,606 WARN L181 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-08 14:40:36,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:36,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:40:36,915 WARN L181 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-01-08 14:40:36,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:36,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:36,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:40:37,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:40:37,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:40:37,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:40:37,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:40:37,269 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,310 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,352 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,394 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,437 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,478 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:40:37,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:40:37,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:40:37,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:40:37,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:40:37,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:40:37,549 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 14:40:37,549 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,602 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,633 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,657 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,676 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,692 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,707 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:37,777 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:40:37,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,816 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 14:40:37,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:37,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:40:37,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:37,927 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 14:40:37,928 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:37,998 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 14:40:37,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:40:38,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:38,043 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:38,044 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 158 [2019-01-08 14:40:38,045 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:38,120 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 14:40:38,120 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:40:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:38,148 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:38,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:38,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:40:38,209 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:38,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:40:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:40:38,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:40:38,210 INFO L87 Difference]: Start difference. First operand 1122 states and 8658 transitions. Second operand 10 states. [2019-01-08 14:40:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:39,420 INFO L93 Difference]: Finished difference Result 1181 states and 8791 transitions. [2019-01-08 14:40:39,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:40:39,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:40:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:39,426 INFO L225 Difference]: With dead ends: 1181 [2019-01-08 14:40:39,426 INFO L226 Difference]: Without dead ends: 1180 [2019-01-08 14:40:39,427 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:40:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2019-01-08 14:40:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1130. [2019-01-08 14:40:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1130 states. [2019-01-08 14:40:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 8722 transitions. [2019-01-08 14:40:39,983 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 8722 transitions. Word has length 6 [2019-01-08 14:40:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:39,983 INFO L480 AbstractCegarLoop]: Abstraction has 1130 states and 8722 transitions. [2019-01-08 14:40:39,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:40:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 8722 transitions. [2019-01-08 14:40:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:39,987 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:39,987 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:39,987 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:39,987 INFO L82 PathProgramCache]: Analyzing trace with hash 893612886, now seen corresponding path program 1 times [2019-01-08 14:40:39,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:39,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:39,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:39,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:40:40,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:40,072 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:40,073 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:40,073 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [34], [35] [2019-01-08 14:40:40,074 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:40,074 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:40,297 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:40,297 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:40:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:40,297 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:40,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:40,297 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:40,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:40,305 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:40,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:40,342 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 14:40:40,348 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 14:40:40,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:40:40,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,373 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 14:40:40,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:40:40,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,394 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 14:40:40,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:40,408 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,450 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,484 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,507 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,529 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,546 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,560 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:40,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:40,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:40,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,746 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:40,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:40,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:40,817 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,843 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,868 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,894 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,919 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:40,968 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 14:40:40,968 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:41,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:40:41,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:41,061 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:41,061 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:41,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:41,092 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:40:41,093 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:41,138 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 14:40:41,138 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:40:41,161 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 14:40:41,161 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:41,178 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 14:40:41,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:41,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:40:41,198 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:41,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:40:41,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:40:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:40:41,198 INFO L87 Difference]: Start difference. First operand 1130 states and 8722 transitions. Second operand 8 states. [2019-01-08 14:40:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:42,275 INFO L93 Difference]: Finished difference Result 1200 states and 9000 transitions. [2019-01-08 14:40:42,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:40:42,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:40:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:42,280 INFO L225 Difference]: With dead ends: 1200 [2019-01-08 14:40:42,280 INFO L226 Difference]: Without dead ends: 1199 [2019-01-08 14:40:42,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:40:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-01-08 14:40:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1150. [2019-01-08 14:40:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2019-01-08 14:40:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 8882 transitions. [2019-01-08 14:40:42,974 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 8882 transitions. Word has length 6 [2019-01-08 14:40:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:42,975 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 8882 transitions. [2019-01-08 14:40:42,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:40:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 8882 transitions. [2019-01-08 14:40:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:42,977 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:42,977 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:40:42,977 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash 893590996, now seen corresponding path program 2 times [2019-01-08 14:40:42,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:42,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:42,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:42,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:42,978 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:40:43,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:43,053 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:43,053 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:40:43,053 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:40:43,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:43,054 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:43,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:40:43,064 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:40:43,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:40:43,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:40:43,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:43,100 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 14:40:43,103 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 14:40:43,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:40:43,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:40:43,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:40:43,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,258 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:40:43,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,419 INFO L303 Elim1Store]: Index analysis took 159 ms [2019-01-08 14:40:43,420 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 14:40:43,421 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,630 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,672 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,697 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,719 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,734 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,749 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:43,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:40:43,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:40:43,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:40:43,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:43,953 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:40:44,079 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-08 14:40:44,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:40:44,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,197 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:40:44,197 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,237 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,277 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,317 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,359 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,401 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,471 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 14:40:44,472 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:40:44,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,505 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 14:40:44,505 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,573 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:44,573 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:40:44,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,612 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 14:40:44,612 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,679 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 14:40:44,679 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:76 [2019-01-08 14:40:44,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,722 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:44,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 151 [2019-01-08 14:40:44,725 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,797 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 14:40:44,798 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:64 [2019-01-08 14:40:44,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:44,846 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 164 [2019-01-08 14:40:44,847 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:44,927 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 14:40:44,927 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:62 [2019-01-08 14:40:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:44,966 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:45,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:45,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:40:45,031 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:45,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:40:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:40:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:40:45,032 INFO L87 Difference]: Start difference. First operand 1150 states and 8882 transitions. Second operand 11 states. [2019-01-08 14:40:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:46,689 INFO L93 Difference]: Finished difference Result 1456 states and 10849 transitions. [2019-01-08 14:40:46,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:40:46,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:40:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:46,697 INFO L225 Difference]: With dead ends: 1456 [2019-01-08 14:40:46,697 INFO L226 Difference]: Without dead ends: 1455 [2019-01-08 14:40:46,698 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:40:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2019-01-08 14:40:47,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1376. [2019-01-08 14:40:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2019-01-08 14:40:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 10689 transitions. [2019-01-08 14:40:47,386 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 10689 transitions. Word has length 6 [2019-01-08 14:40:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:47,386 INFO L480 AbstractCegarLoop]: Abstraction has 1376 states and 10689 transitions. [2019-01-08 14:40:47,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:40:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 10689 transitions. [2019-01-08 14:40:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:47,389 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:47,389 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:47,389 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:47,389 INFO L82 PathProgramCache]: Analyzing trace with hash 893591492, now seen corresponding path program 2 times [2019-01-08 14:40:47,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:47,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:47,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:40:47,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:47,390 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:47,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:47,479 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:47,479 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:40:47,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:40:47,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:47,480 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:47,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:40:47,489 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:40:47,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:40:47,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:40:47,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:47,533 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 14:40:47,536 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 14:40:47,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,541 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 14:40:47,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,548 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 14:40:47,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,557 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:40:47,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,567 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 14:40:47,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,578 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 14:40:47,579 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,639 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,674 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,701 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,724 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,742 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,760 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:47,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:40:47,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:40:47,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:40:47,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:47,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:40:48,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,055 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:40:48,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:40:48,159 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,198 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,239 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,281 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,323 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,365 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,436 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:48,436 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:40:48,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,482 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 14:40:48,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,549 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:48,550 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:40:48,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,592 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 14:40:48,593 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,662 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:48,662 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:76 [2019-01-08 14:40:48,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,704 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:48,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,706 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 151 [2019-01-08 14:40:48,706 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,780 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 14:40:48,781 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:64 [2019-01-08 14:40:48,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,824 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:48,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:48,826 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 50 treesize of output 153 [2019-01-08 14:40:48,827 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:48,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:48,935 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:62 [2019-01-08 14:40:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:48,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:49,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:49,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:40:49,049 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:49,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:40:49,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:40:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:40:49,049 INFO L87 Difference]: Start difference. First operand 1376 states and 10689 transitions. Second operand 12 states. [2019-01-08 14:40:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:52,702 INFO L93 Difference]: Finished difference Result 1569 states and 11731 transitions. [2019-01-08 14:40:52,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:40:52,702 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:40:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:52,709 INFO L225 Difference]: With dead ends: 1569 [2019-01-08 14:40:52,709 INFO L226 Difference]: Without dead ends: 1567 [2019-01-08 14:40:52,709 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:40:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2019-01-08 14:40:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 904. [2019-01-08 14:40:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2019-01-08 14:40:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 6903 transitions. [2019-01-08 14:40:53,252 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 6903 transitions. Word has length 6 [2019-01-08 14:40:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:53,253 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 6903 transitions. [2019-01-08 14:40:53,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:40:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 6903 transitions. [2019-01-08 14:40:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:53,255 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:53,255 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:53,255 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:53,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 893710844, now seen corresponding path program 1 times [2019-01-08 14:40:53,255 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:53,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:53,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:40:53,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:53,256 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:53,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:53,365 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:53,366 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:53,366 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [32], [33] [2019-01-08 14:40:53,366 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:53,366 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:53,677 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:53,677 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:40:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:53,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:53,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:53,678 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:53,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:53,686 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:53,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:53,722 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 14:40:53,728 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 14:40:53,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,734 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 14:40:53,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,744 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 14:40:53,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,757 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 14:40:53,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,772 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 14:40:53,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:40:53,786 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,830 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,864 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,892 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,913 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,929 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,944 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:53,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:53,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:40:54,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:40:54,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:40:54,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:40:54,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:40:54,200 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,227 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,253 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,280 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,307 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,357 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 14:40:54,357 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:40:54,630 WARN L181 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-08 14:40:54,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:40:54,636 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:54,681 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:40:54,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,710 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:54,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:40:54,711 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,759 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 14:40:54,760 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:59 [2019-01-08 14:40:54,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:54,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:40:54,797 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:54,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:54,846 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2019-01-08 14:40:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:54,870 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:54,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:54,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-08 14:40:54,907 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:54,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:40:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:40:54,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:40:54,908 INFO L87 Difference]: Start difference. First operand 904 states and 6903 transitions. Second operand 10 states. [2019-01-08 14:40:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:56,163 INFO L93 Difference]: Finished difference Result 1031 states and 7569 transitions. [2019-01-08 14:40:56,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:40:56,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:40:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:56,169 INFO L225 Difference]: With dead ends: 1031 [2019-01-08 14:40:56,169 INFO L226 Difference]: Without dead ends: 1029 [2019-01-08 14:40:56,170 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:40:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2019-01-08 14:40:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 928. [2019-01-08 14:40:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2019-01-08 14:40:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 7068 transitions. [2019-01-08 14:40:56,740 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 7068 transitions. Word has length 6 [2019-01-08 14:40:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:40:56,740 INFO L480 AbstractCegarLoop]: Abstraction has 928 states and 7068 transitions. [2019-01-08 14:40:56,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:40:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 7068 transitions. [2019-01-08 14:40:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:40:56,742 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:40:56,743 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:40:56,743 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:40:56,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash 893728142, now seen corresponding path program 1 times [2019-01-08 14:40:56,743 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:40:56,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:56,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:56,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:40:56,744 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:40:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:56,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:56,889 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:40:56,889 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:40:56,889 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [32], [33] [2019-01-08 14:40:56,890 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:40:56,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:40:57,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:40:57,267 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:40:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:40:57,267 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:40:57,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:40:57,267 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:40:57,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:40:57,275 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:40:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:40:57,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:40:57,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:40:57,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:40:57,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:40:57,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:40:57,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:40:57,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:57,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:40:57,700 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:57,743 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:57,784 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:57,827 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:57,869 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:57,913 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:57,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:40:57,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:40:57,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:40:57,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:40:57,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 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 14:40:57,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:40:57,988 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 14:40:57,988 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,041 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,072 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,095 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,115 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,131 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,145 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,214 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:58,215 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:40:58,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,249 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 14:40:58,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,315 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:40:58,316 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:40:58,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,362 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:58,363 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 134 [2019-01-08 14:40:58,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,431 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 14:40:58,431 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:80 [2019-01-08 14:40:58,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:40:58,476 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:40:58,476 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 134 [2019-01-08 14:40:58,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:40:58,542 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 14:40:58,543 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:90, output treesize:72 [2019-01-08 14:40:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:58,580 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:40:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:40:58,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:40:58,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2019-01-08 14:40:58,647 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:40:58,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:40:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:40:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:40:58,647 INFO L87 Difference]: Start difference. First operand 928 states and 7068 transitions. Second operand 11 states. [2019-01-08 14:40:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:40:59,960 INFO L93 Difference]: Finished difference Result 980 states and 7166 transitions. [2019-01-08 14:40:59,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:40:59,960 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2019-01-08 14:40:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:40:59,964 INFO L225 Difference]: With dead ends: 980 [2019-01-08 14:40:59,964 INFO L226 Difference]: Without dead ends: 977 [2019-01-08 14:40:59,965 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:40:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-01-08 14:41:00,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 935. [2019-01-08 14:41:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 935 states. [2019-01-08 14:41:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 7124 transitions. [2019-01-08 14:41:00,525 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 7124 transitions. Word has length 6 [2019-01-08 14:41:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:00,525 INFO L480 AbstractCegarLoop]: Abstraction has 935 states and 7124 transitions. [2019-01-08 14:41:00,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:41:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 7124 transitions. [2019-01-08 14:41:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:00,526 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:00,527 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:00,527 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash 893714688, now seen corresponding path program 1 times [2019-01-08 14:41:00,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:00,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:00,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:00,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:00,528 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:41:00,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:00,603 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:00,603 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:00,603 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [32], [33] [2019-01-08 14:41:00,604 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:00,604 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:00,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:00,925 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:41:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:00,925 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:00,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:00,925 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:00,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:00,933 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:00,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:00,965 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 14:41:00,971 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 14:41:00,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:00,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:00,981 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 14:41:00,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:00,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:00,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:00,991 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 14:41:00,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:00,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,005 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 14:41:01,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,019 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 14:41:01,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:01,029 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,069 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,104 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,131 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,153 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,171 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,186 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,224 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:01,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:01,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:01,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,365 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:01,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:01,440 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,467 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,494 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,521 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,548 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,597 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:01,597 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:01,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:01,653 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:01,698 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:01,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,732 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:01,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:41:01,734 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,779 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:01,780 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2019-01-08 14:41:01,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:01,896 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:01,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:41:01,898 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:01,945 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 14:41:01,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:55 [2019-01-08 14:41:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:01,970 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:02,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:02,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:41:02,030 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:02,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:41:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:41:02,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:41:02,031 INFO L87 Difference]: Start difference. First operand 935 states and 7124 transitions. Second operand 9 states. [2019-01-08 14:41:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:03,275 INFO L93 Difference]: Finished difference Result 975 states and 7191 transitions. [2019-01-08 14:41:03,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:41:03,276 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:41:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:03,280 INFO L225 Difference]: With dead ends: 975 [2019-01-08 14:41:03,280 INFO L226 Difference]: Without dead ends: 974 [2019-01-08 14:41:03,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:03,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2019-01-08 14:41:03,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 939. [2019-01-08 14:41:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 939 states. [2019-01-08 14:41:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 7156 transitions. [2019-01-08 14:41:03,910 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 7156 transitions. Word has length 6 [2019-01-08 14:41:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:03,911 INFO L480 AbstractCegarLoop]: Abstraction has 939 states and 7156 transitions. [2019-01-08 14:41:03,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:41:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 7156 transitions. [2019-01-08 14:41:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:03,913 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:03,913 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:03,913 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:03,913 INFO L82 PathProgramCache]: Analyzing trace with hash 893374558, now seen corresponding path program 1 times [2019-01-08 14:41:03,913 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:03,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:03,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:03,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:03,914 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:41:04,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:04,015 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:04,015 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:04,015 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [32], [34], [35] [2019-01-08 14:41:04,016 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:04,016 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:04,264 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:04,264 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:41:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:04,264 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:04,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:04,264 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:04,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:04,273 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:04,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:04,315 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 14:41:04,320 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 14:41:04,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,328 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 14:41:04,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,339 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 14:41:04,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,347 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 14:41:04,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,358 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 14:41:04,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:04,373 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,416 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,449 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,476 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,498 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,515 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,530 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:04,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:04,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:04,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:04,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:04,785 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,812 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,838 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,865 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,892 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:04,941 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 14:41:04,942 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:04,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:04,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:04,988 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:05,034 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:05,034 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:05,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:05,066 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:41:05,067 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:05,114 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 14:41:05,115 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:41:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:05,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:05,154 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 14:41:05,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:05,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2019-01-08 14:41:05,175 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:05,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:41:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:41:05,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:41:05,175 INFO L87 Difference]: Start difference. First operand 939 states and 7156 transitions. Second operand 9 states. [2019-01-08 14:41:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:06,399 INFO L93 Difference]: Finished difference Result 1071 states and 7716 transitions. [2019-01-08 14:41:06,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:41:06,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:41:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:06,403 INFO L225 Difference]: With dead ends: 1071 [2019-01-08 14:41:06,404 INFO L226 Difference]: Without dead ends: 1070 [2019-01-08 14:41:06,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:41:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2019-01-08 14:41:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 995. [2019-01-08 14:41:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2019-01-08 14:41:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 7604 transitions. [2019-01-08 14:41:07,071 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 7604 transitions. Word has length 6 [2019-01-08 14:41:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:07,072 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 7604 transitions. [2019-01-08 14:41:07,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:41:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 7604 transitions. [2019-01-08 14:41:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:07,075 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:07,075 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:07,075 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:07,076 INFO L82 PathProgramCache]: Analyzing trace with hash 893851214, now seen corresponding path program 1 times [2019-01-08 14:41:07,076 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:07,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:07,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:07,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:07,076 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:41:07,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:07,150 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:07,150 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:07,150 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [32], [34], [35] [2019-01-08 14:41:07,151 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:07,151 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:07,381 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:07,382 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:41:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:07,382 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:07,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:07,382 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:07,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:07,392 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:07,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:07,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:07,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:07,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:07,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:07,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:07,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:07,670 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,699 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,726 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,753 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,782 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:07,823 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:41:07,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:07,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:41:07,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:41:07,834 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 14:41:07,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:07,843 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,880 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,910 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,931 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,950 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,966 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:07,980 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:08,030 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 14:41:08,031 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:08,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:08,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:08,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:08,129 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:08,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:08,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:41:08,165 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:08,215 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 14:41:08,215 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2019-01-08 14:41:08,239 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 14:41:08,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:08,255 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 14:41:08,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:08,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-08 14:41:08,275 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:08,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:41:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:41:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-01-08 14:41:08,276 INFO L87 Difference]: Start difference. First operand 995 states and 7604 transitions. Second operand 8 states. [2019-01-08 14:41:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:09,428 INFO L93 Difference]: Finished difference Result 1045 states and 7753 transitions. [2019-01-08 14:41:09,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:41:09,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:41:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:09,433 INFO L225 Difference]: With dead ends: 1045 [2019-01-08 14:41:09,434 INFO L226 Difference]: Without dead ends: 1044 [2019-01-08 14:41:09,434 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:41:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2019-01-08 14:41:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1007. [2019-01-08 14:41:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1007 states. [2019-01-08 14:41:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 7700 transitions. [2019-01-08 14:41:10,166 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 7700 transitions. Word has length 6 [2019-01-08 14:41:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:10,166 INFO L480 AbstractCegarLoop]: Abstraction has 1007 states and 7700 transitions. [2019-01-08 14:41:10,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:41:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 7700 transitions. [2019-01-08 14:41:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:10,168 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:10,168 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:10,168 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash 893841540, now seen corresponding path program 1 times [2019-01-08 14:41:10,169 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:10,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:10,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:10,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:10,170 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:41:10,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:10,222 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:10,222 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:10,222 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [26], [32], [33] [2019-01-08 14:41:10,223 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:10,223 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:10,570 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:10,570 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:41:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:10,571 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:10,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:10,571 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:10,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:10,578 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:10,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:10,606 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 14:41:10,612 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 14:41:10,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,618 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 14:41:10,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,628 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 14:41:10,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,642 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 14:41:10,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,659 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 14:41:10,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:10,677 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,719 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,752 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,778 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,798 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,815 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,830 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:10,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:10,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:10,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:10,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:11,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:11,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:11,088 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,115 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,142 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,169 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,196 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,246 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:11,247 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:11,377 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-08 14:41:11,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:11,383 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,428 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:11,428 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:11,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:41:11,464 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:11,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:41:11,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:11,558 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:11,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:41:11,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:11,611 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 14:41:11,612 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:41:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:11,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:11,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:11,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:41:11,693 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:11,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:41:11,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:41:11,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:41:11,694 INFO L87 Difference]: Start difference. First operand 1007 states and 7700 transitions. Second operand 9 states. [2019-01-08 14:41:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:13,067 INFO L93 Difference]: Finished difference Result 1066 states and 7837 transitions. [2019-01-08 14:41:13,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:41:13,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:41:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:13,071 INFO L225 Difference]: With dead ends: 1066 [2019-01-08 14:41:13,071 INFO L226 Difference]: Without dead ends: 1064 [2019-01-08 14:41:13,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2019-01-08 14:41:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1018. [2019-01-08 14:41:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1018 states. [2019-01-08 14:41:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 7788 transitions. [2019-01-08 14:41:13,827 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 7788 transitions. Word has length 6 [2019-01-08 14:41:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:13,828 INFO L480 AbstractCegarLoop]: Abstraction has 1018 states and 7788 transitions. [2019-01-08 14:41:13,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:41:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 7788 transitions. [2019-01-08 14:41:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:13,830 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:13,830 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:13,830 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 893847306, now seen corresponding path program 1 times [2019-01-08 14:41:13,830 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:13,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:13,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:13,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:13,831 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:13,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:13,967 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:13,967 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:13,967 INFO L207 CegarAbsIntRunner]: [0], [6], [26], [28], [32], [33] [2019-01-08 14:41:13,971 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:13,971 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:14,314 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:14,314 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:41:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:14,314 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:14,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:14,315 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:14,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:14,329 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:14,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:14,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,384 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:41:14,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:41:14,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:41:14,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:41:14,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:41:14,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:14,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:41:14,756 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:14,804 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:14,851 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:14,899 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:14,946 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:14,995 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:15,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 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 14:41:15,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:15,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:41:15,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:41:15,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:41:15,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 14:41:15,070 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,124 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,155 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,177 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,196 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,212 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,227 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:15,296 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:41:15,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,332 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 14:41:15,332 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,397 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:15,397 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:41:15,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,438 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 14:41:15,439 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,510 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 14:41:15,510 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:76 [2019-01-08 14:41:15,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:15,558 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:15,558 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 158 [2019-01-08 14:41:15,559 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:15,633 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 14:41:15,634 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:41:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:15,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:15,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:15,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:41:15,744 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:15,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:41:15,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:41:15,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:41:15,745 INFO L87 Difference]: Start difference. First operand 1018 states and 7788 transitions. Second operand 10 states. [2019-01-08 14:41:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:17,616 INFO L93 Difference]: Finished difference Result 1310 states and 9587 transitions. [2019-01-08 14:41:17,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:41:17,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:41:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:17,623 INFO L225 Difference]: With dead ends: 1310 [2019-01-08 14:41:17,623 INFO L226 Difference]: Without dead ends: 1307 [2019-01-08 14:41:17,623 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2019-01-08 14:41:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1139. [2019-01-08 14:41:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2019-01-08 14:41:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 8742 transitions. [2019-01-08 14:41:18,621 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 8742 transitions. Word has length 6 [2019-01-08 14:41:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:18,621 INFO L480 AbstractCegarLoop]: Abstraction has 1139 states and 8742 transitions. [2019-01-08 14:41:18,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:41:18,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 8742 transitions. [2019-01-08 14:41:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:18,624 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:18,624 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:18,624 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 893833852, now seen corresponding path program 1 times [2019-01-08 14:41:18,624 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:18,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:18,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:18,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:18,625 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:41:19,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:19,022 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:19,022 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:19,022 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [26], [32], [33] [2019-01-08 14:41:19,023 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:19,023 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:19,651 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:19,651 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:41:19,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:19,651 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:19,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:19,652 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:19,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:19,663 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:19,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:19,835 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:41:19,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:19,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:19,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:19,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:19,989 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:20,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:20,063 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,100 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,137 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,175 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,215 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:20,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:41:20,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:20,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:41:20,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:41:20,295 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 14:41:20,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:20,304 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,342 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,370 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,393 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,411 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,426 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,440 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,487 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:20,487 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:20,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:20,552 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:20,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:20,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:41:20,632 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:20,682 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:41:20,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:20,723 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:20,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2019-01-08 14:41:20,724 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:20,776 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 14:41:20,777 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:41:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:20,800 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:20,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:20,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:41:20,860 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:20,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:41:20,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:41:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:41:20,860 INFO L87 Difference]: Start difference. First operand 1139 states and 8742 transitions. Second operand 9 states. [2019-01-08 14:41:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:22,400 INFO L93 Difference]: Finished difference Result 1186 states and 8852 transitions. [2019-01-08 14:41:22,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:41:22,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:41:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:22,406 INFO L225 Difference]: With dead ends: 1186 [2019-01-08 14:41:22,406 INFO L226 Difference]: Without dead ends: 1185 [2019-01-08 14:41:22,407 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2019-01-08 14:41:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1148. [2019-01-08 14:41:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1148 states. [2019-01-08 14:41:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 8814 transitions. [2019-01-08 14:41:23,378 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 8814 transitions. Word has length 6 [2019-01-08 14:41:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:23,378 INFO L480 AbstractCegarLoop]: Abstraction has 1148 states and 8814 transitions. [2019-01-08 14:41:23,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:41:23,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 8814 transitions. [2019-01-08 14:41:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:23,381 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:23,381 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:23,381 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash 893893434, now seen corresponding path program 1 times [2019-01-08 14:41:23,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:23,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:23,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:23,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:23,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:41:23,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:23,440 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:23,440 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:23,440 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [32], [33] [2019-01-08 14:41:23,442 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:23,442 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:23,774 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:23,774 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:41:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:23,774 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:23,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:23,775 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:23,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:23,784 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:23,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:23,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,825 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:41:23,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:41:23,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,934 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:41:23,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:23,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:41:24,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:41:24,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:41:24,187 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,226 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,268 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,311 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,355 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,399 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:24,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 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 14:41:24,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:24,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 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 14:41:24,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:41:24,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:41:24,469 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 14:41:24,470 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,522 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,553 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,577 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,596 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,612 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,627 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,695 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:24,695 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:41:24,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,731 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 14:41:24,732 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,798 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:24,798 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:41:24,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,839 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:24,840 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 134 [2019-01-08 14:41:24,840 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:24,909 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 14:41:24,909 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:80 [2019-01-08 14:41:24,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:24,950 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:24,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 134 [2019-01-08 14:41:24,952 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:25,020 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 14:41:25,020 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:90, output treesize:72 [2019-01-08 14:41:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:25,058 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:25,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:25,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:41:25,114 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:25,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:41:25,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:41:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:41:25,115 INFO L87 Difference]: Start difference. First operand 1148 states and 8814 transitions. Second operand 9 states. [2019-01-08 14:41:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:26,889 INFO L93 Difference]: Finished difference Result 1194 states and 8890 transitions. [2019-01-08 14:41:26,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:41:26,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:41:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:26,893 INFO L225 Difference]: With dead ends: 1194 [2019-01-08 14:41:26,893 INFO L226 Difference]: Without dead ends: 1193 [2019-01-08 14:41:26,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2019-01-08 14:41:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1150. [2019-01-08 14:41:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2019-01-08 14:41:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 8830 transitions. [2019-01-08 14:41:27,912 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 8830 transitions. Word has length 6 [2019-01-08 14:41:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:27,912 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 8830 transitions. [2019-01-08 14:41:27,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:41:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 8830 transitions. [2019-01-08 14:41:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:27,914 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:27,914 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:27,915 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash 908389222, now seen corresponding path program 1 times [2019-01-08 14:41:27,915 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:27,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:27,915 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:28,049 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-01-08 14:41:28,241 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 14:41:28,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:28,242 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:28,242 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:28,242 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [34], [35] [2019-01-08 14:41:28,243 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:28,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:28,467 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:28,468 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:41:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:28,468 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:28,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:28,468 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:28,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:28,478 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:28,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:28,515 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 14:41:28,517 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 14:41:28,521 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 29 treesize of output 35 [2019-01-08 14:41:28,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,533 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 14:41:28,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,555 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 14:41:28,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,566 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 14:41:28,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:41:28,578 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,615 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,645 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,668 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,684 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,702 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,718 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,751 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 57 treesize of output 63 [2019-01-08 14:41:28,754 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 48 [2019-01-08 14:41:28,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,777 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 41 treesize of output 62 [2019-01-08 14:41:28,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:41:28,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:28,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:41:28,891 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,913 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,936 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,960 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:28,985 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:29,029 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 14:41:29,029 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:84, output treesize:88 [2019-01-08 14:41:29,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 89 [2019-01-08 14:41:29,070 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:29,110 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:29,110 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:93, output treesize:63 [2019-01-08 14:41:29,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:29,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 95 [2019-01-08 14:41:29,143 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:29,185 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 14:41:29,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:47 [2019-01-08 14:41:29,208 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 14:41:29,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:29,229 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 14:41:29,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:29,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:41:29,250 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:29,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:41:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:41:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:41:29,251 INFO L87 Difference]: Start difference. First operand 1150 states and 8830 transitions. Second operand 8 states. [2019-01-08 14:41:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:30,560 INFO L93 Difference]: Finished difference Result 1188 states and 8868 transitions. [2019-01-08 14:41:30,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:41:30,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:41:30,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:30,566 INFO L225 Difference]: With dead ends: 1188 [2019-01-08 14:41:30,566 INFO L226 Difference]: Without dead ends: 1187 [2019-01-08 14:41:30,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:41:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2019-01-08 14:41:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1150. [2019-01-08 14:41:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2019-01-08 14:41:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 8830 transitions. [2019-01-08 14:41:31,577 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 8830 transitions. Word has length 6 [2019-01-08 14:41:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:31,577 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 8830 transitions. [2019-01-08 14:41:31,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:41:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 8830 transitions. [2019-01-08 14:41:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:31,579 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:31,579 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:31,579 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash 908363984, now seen corresponding path program 1 times [2019-01-08 14:41:31,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:31,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:31,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:31,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:31,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:31,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:31,749 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:31,749 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:31,749 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [26], [31] [2019-01-08 14:41:31,749 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:31,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:32,154 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:32,154 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:41:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:32,155 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:32,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:32,155 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:32,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:32,163 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:32,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:32,205 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 14:41:32,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:41:32,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,215 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 14:41:32,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,227 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 14:41:32,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,234 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 14:41:32,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,250 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 14:41:32,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:32,262 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,304 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,338 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,363 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,383 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,397 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,412 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:32,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:32,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:32,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:32,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:32,665 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,693 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,719 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,746 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,773 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:32,829 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:32,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,891 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:32,892 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:32,934 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:32,935 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:32,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:32,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:41:32,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:33,027 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:33,027 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:41:33,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,067 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:33,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:41:33,068 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:33,118 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:33,118 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:41:33,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,156 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:33,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:33,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:41:33,159 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:33,207 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 14:41:33,207 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:41:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:33,232 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:33,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:33,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2019-01-08 14:41:33,282 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:33,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:41:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:41:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:41:33,283 INFO L87 Difference]: Start difference. First operand 1150 states and 8830 transitions. Second operand 12 states. [2019-01-08 14:41:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:35,483 INFO L93 Difference]: Finished difference Result 1387 states and 10137 transitions. [2019-01-08 14:41:35,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:41:35,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:41:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:35,489 INFO L225 Difference]: With dead ends: 1387 [2019-01-08 14:41:35,489 INFO L226 Difference]: Without dead ends: 1385 [2019-01-08 14:41:35,490 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:41:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-01-08 14:41:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1178. [2019-01-08 14:41:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2019-01-08 14:41:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 9054 transitions. [2019-01-08 14:41:36,571 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 9054 transitions. Word has length 6 [2019-01-08 14:41:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:36,571 INFO L480 AbstractCegarLoop]: Abstraction has 1178 states and 9054 transitions. [2019-01-08 14:41:36,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:41:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 9054 transitions. [2019-01-08 14:41:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:36,573 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:36,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:36,573 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:36,574 INFO L82 PathProgramCache]: Analyzing trace with hash 908367890, now seen corresponding path program 1 times [2019-01-08 14:41:36,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:36,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:36,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:36,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:36,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:36,709 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:36,709 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:36,709 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [28], [31] [2019-01-08 14:41:36,710 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:36,710 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:37,077 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:37,078 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:41:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:37,078 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:37,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:37,078 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:37,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:37,087 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:37,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:37,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:41:37,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:41:37,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:41:37,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:41:37,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,396 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:41:37,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,493 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,494 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:37,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:41:37,500 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,541 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,579 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,620 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,662 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,704 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:37,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:41:37,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:37,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 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 14:41:37,767 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 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 14:41:37,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 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 14:41:37,773 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 14:41:37,773 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,824 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,853 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,874 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,893 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,908 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,922 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:37,990 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:37,990 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:41:38,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,040 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:41:38,041 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:38,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:38,108 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:41:38,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,157 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 14:41:38,158 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:38,228 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:38,229 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:76 [2019-01-08 14:41:38,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,274 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:38,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 151 [2019-01-08 14:41:38,277 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:38,351 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 14:41:38,352 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:64 [2019-01-08 14:41:38,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:38,403 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:38,404 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 50 treesize of output 154 [2019-01-08 14:41:38,405 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:38,473 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 14:41:38,474 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:60 [2019-01-08 14:41:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:38,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:38,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:38,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:41:38,602 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:38,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:41:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:41:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:38,602 INFO L87 Difference]: Start difference. First operand 1178 states and 9054 transitions. Second operand 12 states. [2019-01-08 14:41:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:41,852 INFO L93 Difference]: Finished difference Result 1420 states and 10581 transitions. [2019-01-08 14:41:41,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:41:41,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:41:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:41,859 INFO L225 Difference]: With dead ends: 1420 [2019-01-08 14:41:41,859 INFO L226 Difference]: Without dead ends: 1415 [2019-01-08 14:41:41,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:41:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2019-01-08 14:41:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1276. [2019-01-08 14:41:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2019-01-08 14:41:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 9825 transitions. [2019-01-08 14:41:42,912 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 9825 transitions. Word has length 6 [2019-01-08 14:41:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:42,913 INFO L480 AbstractCegarLoop]: Abstraction has 1276 states and 9825 transitions. [2019-01-08 14:41:42,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:41:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 9825 transitions. [2019-01-08 14:41:42,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:42,915 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:42,915 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:42,915 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash 908371176, now seen corresponding path program 1 times [2019-01-08 14:41:42,916 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:42,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:42,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:42,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:42,916 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:42,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:42,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:42,993 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:42,994 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [31] [2019-01-08 14:41:42,994 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:42,994 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:43,349 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:43,349 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:41:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:43,349 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:43,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:43,350 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:43,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:43,358 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:43,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:43,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:43,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:43,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:43,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:43,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,630 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:43,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:43,638 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,676 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,709 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,744 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,783 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:43,835 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:41:43,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:43,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:41:43,843 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:41:43,845 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 14:41:43,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:43,856 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,896 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,926 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,950 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,969 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,985 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:43,999 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,051 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:44,051 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:44,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:44,128 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,174 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:44,174 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:44,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:41:44,223 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,271 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:44,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:41:44,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,314 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:44,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:41:44,315 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,367 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:44,368 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:41:44,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,408 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:44,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:44,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:41:44,411 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:44,462 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 14:41:44,462 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:41:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:44,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:44,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:44,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:41:44,567 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:44,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:41:44,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:41:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:41:44,567 INFO L87 Difference]: Start difference. First operand 1276 states and 9825 transitions. Second operand 12 states. [2019-01-08 14:41:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:46,426 INFO L93 Difference]: Finished difference Result 1449 states and 10752 transitions. [2019-01-08 14:41:46,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:41:46,426 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:41:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:46,432 INFO L225 Difference]: With dead ends: 1449 [2019-01-08 14:41:46,432 INFO L226 Difference]: Without dead ends: 1448 [2019-01-08 14:41:46,433 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:41:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2019-01-08 14:41:47,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1378. [2019-01-08 14:41:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1378 states. [2019-01-08 14:41:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 10640 transitions. [2019-01-08 14:41:47,499 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 10640 transitions. Word has length 6 [2019-01-08 14:41:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:47,499 INFO L480 AbstractCegarLoop]: Abstraction has 1378 states and 10640 transitions. [2019-01-08 14:41:47,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:41:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 10640 transitions. [2019-01-08 14:41:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:47,501 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:47,502 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:47,502 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash 908017528, now seen corresponding path program 1 times [2019-01-08 14:41:47,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:47,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:47,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:47,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:47,503 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:47,658 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-01-08 14:41:47,842 WARN L181 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2019-01-08 14:41:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:47,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:47,866 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:47,866 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:47,866 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [31] [2019-01-08 14:41:47,867 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:47,867 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:48,232 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:48,232 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:41:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:48,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:48,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:48,233 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:48,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:48,240 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:48,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:48,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:41:48,280 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 14:41:48,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:41:48,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,299 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 14:41:48,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,312 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 14:41:48,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,324 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 14:41:48,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:48,338 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,384 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,418 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,441 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,461 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,477 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,494 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:41:48,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:41:48,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:41:48,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:41:48,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:41:48,760 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,787 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,839 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,866 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:48,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:48,916 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:41:48,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:48,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:41:48,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:49,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:49,023 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:41:49,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,060 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:49,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2019-01-08 14:41:49,061 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:49,109 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:49,109 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2019-01-08 14:41:49,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:41:49,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:49,209 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:49,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2019-01-08 14:41:49,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,247 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:49,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:49,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:41:49,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:49,298 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 14:41:49,298 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:41:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:49,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:49,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:49,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:41:49,394 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:41:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:41:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:41:49,395 INFO L87 Difference]: Start difference. First operand 1378 states and 10640 transitions. Second operand 12 states. [2019-01-08 14:41:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:53,108 INFO L93 Difference]: Finished difference Result 1824 states and 13413 transitions. [2019-01-08 14:41:53,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:41:53,109 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:41:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:53,116 INFO L225 Difference]: With dead ends: 1824 [2019-01-08 14:41:53,116 INFO L226 Difference]: Without dead ends: 1822 [2019-01-08 14:41:53,117 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:41:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2019-01-08 14:41:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 970. [2019-01-08 14:41:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2019-01-08 14:41:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 7343 transitions. [2019-01-08 14:41:54,088 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 7343 transitions. Word has length 6 [2019-01-08 14:41:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:54,088 INFO L480 AbstractCegarLoop]: Abstraction has 970 states and 7343 transitions. [2019-01-08 14:41:54,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:41:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 7343 transitions. [2019-01-08 14:41:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:54,090 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:54,091 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:54,091 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:54,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:54,091 INFO L82 PathProgramCache]: Analyzing trace with hash 908144938, now seen corresponding path program 1 times [2019-01-08 14:41:54,091 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:54,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:54,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:54,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:54,092 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:54,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:54,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:54,252 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:54,252 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [26], [28], [31] [2019-01-08 14:41:54,252 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:54,253 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:54,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:54,636 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:41:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:54,637 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:54,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:54,637 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:54,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:54,645 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:54,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:54,677 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 14:41:54,681 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 14:41:54,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,689 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 14:41:54,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,708 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 14:41:54,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,719 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 14:41:54,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,733 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 14:41:54,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,746 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 14:41:54,746 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,807 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,838 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,866 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,887 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,904 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,919 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:54,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:54,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:41:55,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:41:55,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:41:55,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:41:55,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:41:55,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,317 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:41:55,317 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,358 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,399 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,441 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,483 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,525 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:55,595 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:41:55,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,642 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 14:41:55,642 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:55,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:41:55,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,760 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:41:55,760 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,834 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:41:55,834 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:76 [2019-01-08 14:41:55,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,886 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:55,887 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 163 [2019-01-08 14:41:55,888 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:55,964 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 14:41:55,965 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:41:55,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:55,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:56,013 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:41:56,014 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 50 treesize of output 154 [2019-01-08 14:41:56,015 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:41:56,107 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 14:41:56,107 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:60 [2019-01-08 14:41:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:56,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:41:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:56,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:41:56,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:41:56,236 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:41:56,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:41:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:41:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:41:56,237 INFO L87 Difference]: Start difference. First operand 970 states and 7343 transitions. Second operand 12 states. [2019-01-08 14:41:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:41:58,403 INFO L93 Difference]: Finished difference Result 1162 states and 8409 transitions. [2019-01-08 14:41:58,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:41:58,404 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:41:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:41:58,408 INFO L225 Difference]: With dead ends: 1162 [2019-01-08 14:41:58,409 INFO L226 Difference]: Without dead ends: 1157 [2019-01-08 14:41:58,409 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:41:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2019-01-08 14:41:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1026. [2019-01-08 14:41:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2019-01-08 14:41:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 7778 transitions. [2019-01-08 14:41:59,406 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 7778 transitions. Word has length 6 [2019-01-08 14:41:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:41:59,406 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 7778 transitions. [2019-01-08 14:41:59,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:41:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 7778 transitions. [2019-01-08 14:41:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:41:59,408 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:41:59,408 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:41:59,409 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:41:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 908133344, now seen corresponding path program 1 times [2019-01-08 14:41:59,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:41:59,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:59,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:59,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:41:59,410 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:41:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:41:59,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:59,503 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:41:59,503 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:41:59,503 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [26], [31] [2019-01-08 14:41:59,503 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:41:59,504 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:41:59,869 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:41:59,869 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:41:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:41:59,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:41:59,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:41:59,870 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:41:59,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:41:59,878 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:41:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:41:59,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:41:59,914 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 14:41:59,919 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 14:41:59,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,929 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 14:41:59,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,944 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 14:41:59,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:41:59,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:41:59,966 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 14:41:59,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:41:59,978 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,018 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,052 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,077 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,098 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,112 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,129 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,169 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:42:00,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:42:00,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:42:00,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:42:00,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:42:00,388 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,412 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,438 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,465 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,491 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:00,541 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:42:00,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,625 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:42:00,625 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,671 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:00,671 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:42:00,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,715 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:42:00,716 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,765 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:00,766 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2019-01-08 14:42:00,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,810 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:00,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:42:00,812 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:00,862 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:42:00,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:00,907 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:00,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2019-01-08 14:42:00,909 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:00,964 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 14:42:00,964 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:45 [2019-01-08 14:42:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:00,989 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:01,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:01,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:42:01,079 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:01,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:42:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:42:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:01,080 INFO L87 Difference]: Start difference. First operand 1026 states and 7778 transitions. Second operand 12 states. [2019-01-08 14:42:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:02,967 INFO L93 Difference]: Finished difference Result 1141 states and 8225 transitions. [2019-01-08 14:42:02,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:42:02,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:42:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:02,973 INFO L225 Difference]: With dead ends: 1141 [2019-01-08 14:42:02,973 INFO L226 Difference]: Without dead ends: 1139 [2019-01-08 14:42:02,974 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:42:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2019-01-08 14:42:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1071. [2019-01-08 14:42:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-01-08 14:42:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 8138 transitions. [2019-01-08 14:42:03,936 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 8138 transitions. Word has length 6 [2019-01-08 14:42:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:03,937 INFO L480 AbstractCegarLoop]: Abstraction has 1071 states and 8138 transitions. [2019-01-08 14:42:03,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:42:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 8138 transitions. [2019-01-08 14:42:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:03,939 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:03,939 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:03,939 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 908627550, now seen corresponding path program 1 times [2019-01-08 14:42:03,939 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:03,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:03,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:03,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:03,940 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:04,032 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 14:42:04,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:04,033 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:04,033 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:04,033 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [32], [34], [35] [2019-01-08 14:42:04,034 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:04,034 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:04,290 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:04,290 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:42:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:04,291 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:04,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:04,291 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:04,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:04,302 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:04,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:04,337 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 14:42:04,342 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 14:42:04,349 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 29 treesize of output 35 [2019-01-08 14:42:04,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,365 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 14:42:04,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:42:04,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:42:04,413 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:42:04,413 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,449 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,478 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,500 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,516 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,532 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,548 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,583 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 57 treesize of output 63 [2019-01-08 14:42:04,586 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 59 treesize of output 48 [2019-01-08 14:42:04,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,611 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 41 treesize of output 62 [2019-01-08 14:42:04,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:42:04,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,722 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:42:04,723 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,744 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,766 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,789 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,812 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,852 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 14:42:04,853 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:84, output treesize:88 [2019-01-08 14:42:04,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 89 [2019-01-08 14:42:04,902 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:04,941 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:04,942 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:93, output treesize:63 [2019-01-08 14:42:04,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:04,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2019-01-08 14:42:04,973 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:05,016 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 14:42:05,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:47 [2019-01-08 14:42:05,038 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 14:42:05,038 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:05,061 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 14:42:05,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:05,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:42:05,080 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:05,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:42:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:42:05,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:42:05,081 INFO L87 Difference]: Start difference. First operand 1071 states and 8138 transitions. Second operand 8 states. [2019-01-08 14:42:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:06,376 INFO L93 Difference]: Finished difference Result 1104 states and 8169 transitions. [2019-01-08 14:42:06,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:42:06,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:42:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:06,382 INFO L225 Difference]: With dead ends: 1104 [2019-01-08 14:42:06,382 INFO L226 Difference]: Without dead ends: 1103 [2019-01-08 14:42:06,383 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:42:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2019-01-08 14:42:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1071. [2019-01-08 14:42:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-01-08 14:42:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 8138 transitions. [2019-01-08 14:42:07,373 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 8138 transitions. Word has length 6 [2019-01-08 14:42:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:07,373 INFO L480 AbstractCegarLoop]: Abstraction has 1071 states and 8138 transitions. [2019-01-08 14:42:07,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:42:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 8138 transitions. [2019-01-08 14:42:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:07,376 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:07,376 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:07,376 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 908623642, now seen corresponding path program 1 times [2019-01-08 14:42:07,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:07,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:07,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:07,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:07,377 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:07,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:07,431 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:07,431 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:07,431 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [28], [32], [33] [2019-01-08 14:42:07,432 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:07,433 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:07,883 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:07,884 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:42:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:07,884 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:07,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:07,884 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:07,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:07,896 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:07,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:08,143 WARN L181 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-01-08 14:42:08,157 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 14:42:08,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:42:08,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,225 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 14:42:08,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,311 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,312 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 14:42:08,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,414 INFO L303 Elim1Store]: Index analysis took 101 ms [2019-01-08 14:42:08,415 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 14:42:08,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,444 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 14:42:08,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 14:42:08,456 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,524 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,558 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,584 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,607 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,625 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,643 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:08,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:42:08,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:42:08,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:42:08,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:08,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:42:09,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:42:09,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:42:09,118 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,156 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,197 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,238 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,279 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,321 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,390 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:09,390 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:42:09,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,429 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 14:42:09,430 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,499 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:09,499 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:42:09,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,542 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 14:42:09,543 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,614 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 14:42:09,615 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:76 [2019-01-08 14:42:09,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:09,657 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:09,658 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 152 [2019-01-08 14:42:09,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:09,730 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 14:42:09,731 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:42:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:09,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:09,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:09,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:42:09,814 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:09,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:42:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:42:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:42:09,815 INFO L87 Difference]: Start difference. First operand 1071 states and 8138 transitions. Second operand 10 states. [2019-01-08 14:42:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:11,466 INFO L93 Difference]: Finished difference Result 1123 states and 8190 transitions. [2019-01-08 14:42:11,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:42:11,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:42:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:11,471 INFO L225 Difference]: With dead ends: 1123 [2019-01-08 14:42:11,472 INFO L226 Difference]: Without dead ends: 1120 [2019-01-08 14:42:11,472 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-01-08 14:42:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1071. [2019-01-08 14:42:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2019-01-08 14:42:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 8138 transitions. [2019-01-08 14:42:12,471 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 8138 transitions. Word has length 6 [2019-01-08 14:42:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:12,472 INFO L480 AbstractCegarLoop]: Abstraction has 1071 states and 8138 transitions. [2019-01-08 14:42:12,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:42:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 8138 transitions. [2019-01-08 14:42:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:12,474 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:12,474 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:12,474 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash 908622958, now seen corresponding path program 2 times [2019-01-08 14:42:12,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:12,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:12,475 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:12,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:12,611 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:12,611 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:42:12,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:42:12,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:12,611 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:12,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:42:12,621 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:42:12,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:42:12,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:42:12,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:12,659 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 14:42:12,662 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 14:42:12,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,669 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 14:42:12,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,678 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 14:42:12,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,686 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 14:42:12,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,696 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 14:42:12,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,709 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 14:42:12,710 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,771 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,804 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,828 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,850 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,868 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,883 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:12,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:42:12,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:12,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:42:13,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:42:13,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:42:13,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:42:13,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:42:13,287 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,328 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,368 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,409 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,451 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,493 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,563 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:13,563 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:42:13,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,610 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 14:42:13,611 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,680 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:13,681 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:42:13,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,733 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 14:42:13,733 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,807 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:13,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:76 [2019-01-08 14:42:13,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,861 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:13,862 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 152 [2019-01-08 14:42:13,863 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:13,935 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 14:42:13,935 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:42:13,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:13,984 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:13,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 163 [2019-01-08 14:42:13,985 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:14,061 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 14:42:14,061 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:76, output treesize:56 [2019-01-08 14:42:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:14,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:14,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:14,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:42:14,171 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:14,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:42:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:42:14,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:14,171 INFO L87 Difference]: Start difference. First operand 1071 states and 8138 transitions. Second operand 12 states. [2019-01-08 14:42:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:16,253 INFO L93 Difference]: Finished difference Result 1192 states and 8586 transitions. [2019-01-08 14:42:16,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:42:16,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:42:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:16,259 INFO L225 Difference]: With dead ends: 1192 [2019-01-08 14:42:16,259 INFO L226 Difference]: Without dead ends: 1191 [2019-01-08 14:42:16,260 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:42:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2019-01-08 14:42:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1115. [2019-01-08 14:42:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-01-08 14:42:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 8490 transitions. [2019-01-08 14:42:17,274 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 8490 transitions. Word has length 6 [2019-01-08 14:42:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:17,274 INFO L480 AbstractCegarLoop]: Abstraction has 1115 states and 8490 transitions. [2019-01-08 14:42:17,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:42:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 8490 transitions. [2019-01-08 14:42:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:17,277 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:17,277 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:17,277 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:17,278 INFO L82 PathProgramCache]: Analyzing trace with hash 908610188, now seen corresponding path program 1 times [2019-01-08 14:42:17,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:17,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:17,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:42:17,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:17,279 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:17,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:17,339 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:17,339 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:17,339 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [26], [32], [33] [2019-01-08 14:42:17,340 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:17,341 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:17,668 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:17,668 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:42:17,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:17,669 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:17,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:17,669 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:17,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:17,677 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:17,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:17,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:42:17,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:42:17,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,815 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:42:17,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:42:17,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:17,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:42:17,948 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:17,975 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,002 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,030 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,058 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 14:42:18,096 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:42:18,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:42:18,102 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 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 14:42:18,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:42:18,109 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 14:42:18,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:42:18,120 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,157 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,188 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,211 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,228 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,244 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,258 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,308 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:18,309 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:42:18,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:42:18,373 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,419 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:18,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:42:18,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2019-01-08 14:42:18,456 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:18,506 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2019-01-08 14:42:18,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:18,546 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:18,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:42:18,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:18,600 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 14:42:18,601 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2019-01-08 14:42:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:18,623 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:18,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:18,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:42:18,680 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:42:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:42:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:42:18,681 INFO L87 Difference]: Start difference. First operand 1115 states and 8490 transitions. Second operand 10 states. [2019-01-08 14:42:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:20,273 INFO L93 Difference]: Finished difference Result 1165 states and 8547 transitions. [2019-01-08 14:42:20,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:42:20,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:42:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:20,279 INFO L225 Difference]: With dead ends: 1165 [2019-01-08 14:42:20,279 INFO L226 Difference]: Without dead ends: 1164 [2019-01-08 14:42:20,279 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:20,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2019-01-08 14:42:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1115. [2019-01-08 14:42:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-01-08 14:42:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 8490 transitions. [2019-01-08 14:42:21,273 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 8490 transitions. Word has length 6 [2019-01-08 14:42:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:21,273 INFO L480 AbstractCegarLoop]: Abstraction has 1115 states and 8490 transitions. [2019-01-08 14:42:21,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:42:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 8490 transitions. [2019-01-08 14:42:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:21,276 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:21,276 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:21,276 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 908669770, now seen corresponding path program 1 times [2019-01-08 14:42:21,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:21,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:21,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:21,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:21,277 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:21,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:21,360 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:21,360 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:21,360 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [32], [33] [2019-01-08 14:42:21,361 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:21,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:21,678 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:21,679 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:42:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:21,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:21,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:21,679 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:21,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:21,689 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:21,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:21,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:42:21,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:42:21,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:42:21,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:21,962 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:42:22,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:42:22,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:42:22,167 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,215 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,260 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,312 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,364 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,414 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:42:22,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:42:22,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 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 14:42:22,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:42:22,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:42:22,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 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 14:42:22,490 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 14:42:22,490 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,543 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,574 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,597 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,616 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,631 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,645 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:22,711 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:42:22,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,744 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 14:42:22,744 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,808 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:22,808 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:42:22,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,845 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:22,846 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 134 [2019-01-08 14:42:22,847 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:22,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:22,911 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:80 [2019-01-08 14:42:22,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:22,948 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:22,949 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 134 [2019-01-08 14:42:22,950 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:23,014 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 14:42:23,015 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:90, output treesize:72 [2019-01-08 14:42:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:23,042 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:23,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:23,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:42:23,107 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:23,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:42:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:42:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:42:23,108 INFO L87 Difference]: Start difference. First operand 1115 states and 8490 transitions. Second operand 10 states. [2019-01-08 14:42:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:26,773 INFO L93 Difference]: Finished difference Result 1163 states and 8546 transitions. [2019-01-08 14:42:26,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:42:26,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:42:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:26,779 INFO L225 Difference]: With dead ends: 1163 [2019-01-08 14:42:26,779 INFO L226 Difference]: Without dead ends: 1162 [2019-01-08 14:42:26,780 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-01-08 14:42:27,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1115. [2019-01-08 14:42:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-01-08 14:42:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 8490 transitions. [2019-01-08 14:42:27,770 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 8490 transitions. Word has length 6 [2019-01-08 14:42:27,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:27,770 INFO L480 AbstractCegarLoop]: Abstraction has 1115 states and 8490 transitions. [2019-01-08 14:42:27,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:42:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 8490 transitions. [2019-01-08 14:42:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:27,772 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:27,772 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:27,772 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 897297296, now seen corresponding path program 2 times [2019-01-08 14:42:27,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:27,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:27,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:27,773 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:27,926 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2019-01-08 14:42:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:27,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:27,947 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:27,947 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:42:27,947 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:42:27,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:27,947 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:27,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:42:27,957 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:42:27,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:42:27,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:42:27,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:27,991 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 14:42:27,995 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 14:42:27,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:27,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,000 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 14:42:28,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,005 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 14:42:28,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:42:28,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,026 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 14:42:28,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,039 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 14:42:28,039 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,099 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,134 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,160 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,182 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,199 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,212 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:42:28,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:42:28,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:42:28,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:42:28,495 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,496 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,497 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,498 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:42:28,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:42:28,608 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,649 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,689 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,730 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,772 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,815 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,884 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 14:42:28,885 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:42:28,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:28,915 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 14:42:28,916 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:28,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:28,985 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:42:29,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,013 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,019 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:29,020 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 133 [2019-01-08 14:42:29,021 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:29,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:29,089 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:82 [2019-01-08 14:42:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:29,140 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 50 treesize of output 136 [2019-01-08 14:42:29,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:29,208 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 14:42:29,208 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:94, output treesize:68 [2019-01-08 14:42:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:29,234 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:29,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:29,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:42:29,283 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:29,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:42:29,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:42:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:42:29,284 INFO L87 Difference]: Start difference. First operand 1115 states and 8490 transitions. Second operand 10 states. [2019-01-08 14:42:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:31,616 INFO L93 Difference]: Finished difference Result 1580 states and 11836 transitions. [2019-01-08 14:42:31,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:42:31,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:42:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:31,623 INFO L225 Difference]: With dead ends: 1580 [2019-01-08 14:42:31,623 INFO L226 Difference]: Without dead ends: 1574 [2019-01-08 14:42:31,624 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:42:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2019-01-08 14:42:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1182. [2019-01-08 14:42:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-01-08 14:42:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 9009 transitions. [2019-01-08 14:42:32,822 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 9009 transitions. Word has length 6 [2019-01-08 14:42:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:32,822 INFO L480 AbstractCegarLoop]: Abstraction has 1182 states and 9009 transitions. [2019-01-08 14:42:32,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:42:32,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 9009 transitions. [2019-01-08 14:42:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:32,824 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:32,824 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:32,824 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:32,825 INFO L82 PathProgramCache]: Analyzing trace with hash 897545298, now seen corresponding path program 1 times [2019-01-08 14:42:32,825 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:32,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:32,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:42:32,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:32,825 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:42:32,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:32,961 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:32,961 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:32,961 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [32], [34], [35] [2019-01-08 14:42:32,962 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:32,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:33,396 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:33,396 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:42:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:33,397 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:33,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:33,397 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:33,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:33,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:33,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:33,604 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-01-08 14:42:33,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:42:33,774 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2019-01-08 14:42:33,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,779 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:42:33,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:42:33,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:42:33,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:33,958 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:42:33,958 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:33,987 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,015 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,043 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,072 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:42:34,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:42:34,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:42:34,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:42:34,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:42:34,125 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 14:42:34,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:42:34,137 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,175 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,205 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,228 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,247 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,261 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,276 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,326 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 14:42:34,326 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:42:34,457 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-08 14:42:34,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,465 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:42:34,465 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,517 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:34,517 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2019-01-08 14:42:34,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:34,555 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:34,556 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2019-01-08 14:42:34,557 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:34,607 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 14:42:34,608 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:61 [2019-01-08 14:42:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:34,635 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:34,662 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 14:42:34,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:34,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:42:34,683 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:34,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:42:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:42:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:42:34,683 INFO L87 Difference]: Start difference. First operand 1182 states and 9009 transitions. Second operand 8 states. [2019-01-08 14:42:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:36,172 INFO L93 Difference]: Finished difference Result 1206 states and 9039 transitions. [2019-01-08 14:42:36,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-08 14:42:36,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:42:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:36,178 INFO L225 Difference]: With dead ends: 1206 [2019-01-08 14:42:36,179 INFO L226 Difference]: Without dead ends: 1205 [2019-01-08 14:42:36,179 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:42:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2019-01-08 14:42:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1182. [2019-01-08 14:42:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-01-08 14:42:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 9009 transitions. [2019-01-08 14:42:37,483 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 9009 transitions. Word has length 6 [2019-01-08 14:42:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:37,483 INFO L480 AbstractCegarLoop]: Abstraction has 1182 states and 9009 transitions. [2019-01-08 14:42:37,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:42:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 9009 transitions. [2019-01-08 14:42:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:37,486 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:37,486 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-01-08 14:42:37,486 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:37,486 INFO L82 PathProgramCache]: Analyzing trace with hash 897600972, now seen corresponding path program 1 times [2019-01-08 14:42:37,486 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:37,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:37,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:37,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:37,487 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:42:37,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:37,542 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:37,542 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:37,542 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [32], [33] [2019-01-08 14:42:37,542 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:37,542 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:37,840 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:37,840 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:42:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:37,841 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:37,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:37,841 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:37,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:37,848 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:37,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:37,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 14:42:37,909 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 14:42:37,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,915 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 14:42:37,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,923 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 14:42:37,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,932 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 14:42:37,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,942 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 14:42:37,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:37,953 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 14:42:37,954 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,023 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,055 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,101 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,120 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,137 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:42:38,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:42:38,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,284 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:42:38,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:42:38,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:42:38,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:42:38,533 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,573 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,613 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,654 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,696 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,738 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,808 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 14:42:38,808 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:118, output treesize:120 [2019-01-08 14:42:38,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,832 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 14:42:38,832 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:38,901 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 14:42:38,901 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:42:38,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:38,933 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 14:42:38,933 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:39,001 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 14:42:39,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:42:39,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:39,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 154 [2019-01-08 14:42:39,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:39,118 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 14:42:39,118 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:78 [2019-01-08 14:42:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:39,183 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:39,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:39,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2019-01-08 14:42:39,230 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:39,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-01-08 14:42:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-01-08 14:42:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:42:39,230 INFO L87 Difference]: Start difference. First operand 1182 states and 9009 transitions. Second operand 9 states. [2019-01-08 14:42:41,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:41,156 INFO L93 Difference]: Finished difference Result 1301 states and 9571 transitions. [2019-01-08 14:42:41,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:42:41,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2019-01-08 14:42:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:41,162 INFO L225 Difference]: With dead ends: 1301 [2019-01-08 14:42:41,163 INFO L226 Difference]: Without dead ends: 1297 [2019-01-08 14:42:41,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:42:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2019-01-08 14:42:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1231. [2019-01-08 14:42:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1231 states. [2019-01-08 14:42:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 9401 transitions. [2019-01-08 14:42:42,489 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 9401 transitions. Word has length 6 [2019-01-08 14:42:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:42,489 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 9401 transitions. [2019-01-08 14:42:42,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-01-08 14:42:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 9401 transitions. [2019-01-08 14:42:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:42,492 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:42,492 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:42,492 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:42,492 INFO L82 PathProgramCache]: Analyzing trace with hash 897587518, now seen corresponding path program 1 times [2019-01-08 14:42:42,492 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:42,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:42,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:42,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:42,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:42,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:42,639 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:42,639 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:42,639 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [32], [33] [2019-01-08 14:42:42,640 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:42,640 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:42,983 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:42,983 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:42:42,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:42,983 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:42,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:42,983 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:42,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:42,992 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:42,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:43,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:42:43,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:42:43,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:42:43,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:42:43,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,278 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:42:43,282 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,321 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,359 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,397 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,437 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,483 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:42:43,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:42:43,487 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:42:43,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:42:43,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:42:43,496 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 14:42:43,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:42:43,506 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,543 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,574 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,597 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,616 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,632 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,647 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:43,696 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 14:42:43,697 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:95, output treesize:96 [2019-01-08 14:42:43,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-08 14:42:43,740 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:42:43,907 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2019-01-08 14:42:43,907 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:151 [2019-01-08 14:42:43,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:43,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,023 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 10 case distinctions, treesize of input 88 treesize of output 134 [2019-01-08 14:42:44,031 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2019-01-08 14:42:44,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:44,640 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:44,641 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 83 treesize of output 113 [2019-01-08 14:42:44,642 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:44,916 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 29 dim-0 vars, and 7 xjuncts. [2019-01-08 14:42:44,917 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:455 [2019-01-08 14:42:45,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 137 [2019-01-08 14:42:45,076 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:45,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,244 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 101 treesize of output 113 [2019-01-08 14:42:45,244 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:45,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:45,381 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:45,382 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 67 treesize of output 123 [2019-01-08 14:42:45,382 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:45,500 INFO L267 ElimStorePlain]: Start of recursive call 1: 15 dim-0 vars, 3 dim-1 vars, End of recursive call: 15 dim-0 vars, and 3 xjuncts. [2019-01-08 14:42:45,500 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:236, output treesize:178 [2019-01-08 14:42:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:45,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:45,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:45,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:42:45,667 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:45,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:42:45,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:42:45,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:42:45,667 INFO L87 Difference]: Start difference. First operand 1231 states and 9401 transitions. Second operand 10 states. [2019-01-08 14:42:46,978 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 111 [2019-01-08 14:42:47,390 WARN L181 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 71 [2019-01-08 14:42:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:42:50,943 INFO L93 Difference]: Finished difference Result 1674 states and 12199 transitions. [2019-01-08 14:42:50,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-08 14:42:50,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:42:50,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:42:50,949 INFO L225 Difference]: With dead ends: 1674 [2019-01-08 14:42:50,950 INFO L226 Difference]: Without dead ends: 1673 [2019-01-08 14:42:50,950 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2019-01-08 14:42:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1531. [2019-01-08 14:42:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2019-01-08 14:42:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 11833 transitions. [2019-01-08 14:42:52,535 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 11833 transitions. Word has length 6 [2019-01-08 14:42:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:42:52,535 INFO L480 AbstractCegarLoop]: Abstraction has 1531 states and 11833 transitions. [2019-01-08 14:42:52,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:42:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 11833 transitions. [2019-01-08 14:42:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:42:52,538 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:42:52,538 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:42:52,538 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:42:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:52,539 INFO L82 PathProgramCache]: Analyzing trace with hash 912367138, now seen corresponding path program 1 times [2019-01-08 14:42:52,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:42:52,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:52,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:52,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:42:52,539 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:42:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:52,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:52,704 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:42:52,704 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:42:52,704 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [26], [28], [31] [2019-01-08 14:42:52,705 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:42:52,705 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:42:53,072 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:42:53,072 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:42:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:42:53,073 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:42:53,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:42:53,073 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:42:53,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:42:53,081 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:42:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:42:53,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:42:53,121 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 14:42:53,126 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 14:42:53,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,133 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 14:42:53,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:42:53,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,150 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,154 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 14:42:53,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,166 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 14:42:53,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:42:53,178 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,219 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,249 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,274 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,296 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,313 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,329 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:42:53,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:42:53,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:42:53,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:42:53,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:42:53,588 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,615 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,642 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,669 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,696 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:42:53,747 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:42:53,747 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:42:53,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:53,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-08 14:42:53,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:42:53,976 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:42:53,976 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:150 [2019-01-08 14:42:54,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,048 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:54,049 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 83 treesize of output 97 [2019-01-08 14:42:54,049 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:54,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:54,215 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 10 case distinctions, treesize of input 88 treesize of output 146 [2019-01-08 14:42:54,223 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 32 xjuncts. [2019-01-08 14:42:54,864 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 22 dim-0 vars, and 7 xjuncts. [2019-01-08 14:42:54,864 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:172, output treesize:455 [2019-01-08 14:42:55,185 WARN L181 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 151 [2019-01-08 14:42:55,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,204 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:55,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,205 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 67 treesize of output 129 [2019-01-08 14:42:55,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:55,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,509 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 101 treesize of output 113 [2019-01-08 14:42:55,510 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:55,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,741 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:55,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 148 [2019-01-08 14:42:55,742 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:55,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:55,985 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:55,986 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 67 treesize of output 130 [2019-01-08 14:42:55,987 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:56,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,204 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:56,205 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 67 treesize of output 150 [2019-01-08 14:42:56,205 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:56,396 INFO L267 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 5 dim-1 vars, End of recursive call: 20 dim-0 vars, and 5 xjuncts. [2019-01-08 14:42:56,397 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 25 variables, input treesize:370, output treesize:288 [2019-01-08 14:42:56,598 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 129 [2019-01-08 14:42:56,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,608 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,619 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:56,620 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 61 treesize of output 115 [2019-01-08 14:42:56,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:56,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,781 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 83 treesize of output 117 [2019-01-08 14:42:56,781 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:56,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:56,944 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 61 treesize of output 131 [2019-01-08 14:42:56,945 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:57,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,099 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,100 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:42:57,105 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:42:57,106 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 61 treesize of output 139 [2019-01-08 14:42:57,107 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:42:57,238 INFO L267 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 4 dim-1 vars, End of recursive call: 20 dim-0 vars, and 4 xjuncts. [2019-01-08 14:42:57,239 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 24 variables, input treesize:267, output treesize:203 [2019-01-08 14:42:57,368 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-01-08 14:42:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:57,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:42:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:42:57,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:42:57,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:42:57,511 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:42:57,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:42:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:42:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:42:57,512 INFO L87 Difference]: Start difference. First operand 1531 states and 11833 transitions. Second operand 12 states. [2019-01-08 14:42:57,814 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 115 [2019-01-08 14:42:58,025 WARN L181 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2019-01-08 14:42:58,455 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 119 [2019-01-08 14:42:59,184 WARN L181 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 137 [2019-01-08 14:42:59,890 WARN L181 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 151 [2019-01-08 14:43:02,820 WARN L181 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 144 [2019-01-08 14:43:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:03,356 INFO L93 Difference]: Finished difference Result 1671 states and 12135 transitions. [2019-01-08 14:43:03,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-01-08 14:43:03,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:43:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:03,362 INFO L225 Difference]: With dead ends: 1671 [2019-01-08 14:43:03,362 INFO L226 Difference]: Without dead ends: 1669 [2019-01-08 14:43:03,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2019-01-08 14:43:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2019-01-08 14:43:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1550. [2019-01-08 14:43:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1550 states. [2019-01-08 14:43:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 11985 transitions. [2019-01-08 14:43:04,983 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 11985 transitions. Word has length 6 [2019-01-08 14:43:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:04,983 INFO L480 AbstractCegarLoop]: Abstraction has 1550 states and 11985 transitions. [2019-01-08 14:43:04,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:43:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 11985 transitions. [2019-01-08 14:43:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:43:04,986 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:04,986 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:43:04,986 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash 912359450, now seen corresponding path program 1 times [2019-01-08 14:43:04,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:04,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:04,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:04,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:04,987 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:05,445 WARN L181 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-01-08 14:43:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:05,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:05,613 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:05,613 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:43:05,614 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [26], [28], [31] [2019-01-08 14:43:05,614 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:43:05,614 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:43:06,031 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:43:06,032 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:43:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:06,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:43:06,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:06,032 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:43:06,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:06,041 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:43:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:06,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:06,082 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 14:43:06,085 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 14:43:06,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,091 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 14:43:06,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,098 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 14:43:06,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:43:06,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,121 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:43:06,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:43:06,135 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,177 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,209 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,232 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,250 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,283 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:43:06,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,362 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:43:06,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:43:06,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:43:06,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:43:06,540 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,566 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,593 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,620 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,647 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:06,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:43:06,698 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:43:06,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:06,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 106 [2019-01-08 14:43:06,763 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:43:06,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-01-08 14:43:06,931 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:150 [2019-01-08 14:43:07,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,008 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:07,009 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 121 [2019-01-08 14:43:07,010 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:07,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:07,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 134 [2019-01-08 14:43:07,207 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 32 xjuncts. [2019-01-08 14:43:07,792 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 22 dim-0 vars, and 7 xjuncts. [2019-01-08 14:43:07,792 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:172, output treesize:455 [2019-01-08 14:43:08,092 WARN L181 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 151 [2019-01-08 14:43:08,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,102 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 101 treesize of output 111 [2019-01-08 14:43:08,102 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:08,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,339 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:08,340 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 67 treesize of output 126 [2019-01-08 14:43:08,341 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:08,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,581 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:08,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,583 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 67 treesize of output 138 [2019-01-08 14:43:08,583 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:08,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,811 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:08,824 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:08,825 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 67 treesize of output 146 [2019-01-08 14:43:08,826 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:09,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,098 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,098 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:09,101 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,102 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 67 treesize of output 113 [2019-01-08 14:43:09,102 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:09,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 5 dim-1 vars, End of recursive call: 20 dim-0 vars, and 5 xjuncts. [2019-01-08 14:43:09,268 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 25 variables, input treesize:370, output treesize:286 [2019-01-08 14:43:09,452 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 129 [2019-01-08 14:43:09,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,475 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:09,476 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 61 treesize of output 129 [2019-01-08 14:43:09,476 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:09,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,661 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 61 treesize of output 131 [2019-01-08 14:43:09,662 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:09,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,834 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 83 treesize of output 125 [2019-01-08 14:43:09,835 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:09,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,994 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:09,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:09,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 127 [2019-01-08 14:43:09,997 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:10,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 4 dim-1 vars, End of recursive call: 20 dim-0 vars, and 4 xjuncts. [2019-01-08 14:43:10,129 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 24 variables, input treesize:267, output treesize:203 [2019-01-08 14:43:11,965 WARN L181 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 133 [2019-01-08 14:43:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:11,968 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:12,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:43:12,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:43:12,104 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:43:12,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:43:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:43:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:43:12,104 INFO L87 Difference]: Start difference. First operand 1550 states and 11985 transitions. Second operand 12 states. [2019-01-08 14:43:12,463 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 115 [2019-01-08 14:43:12,626 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2019-01-08 14:43:13,148 WARN L181 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 118 [2019-01-08 14:43:13,546 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 135 [2019-01-08 14:43:14,084 WARN L181 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 151 [2019-01-08 14:43:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:17,902 INFO L93 Difference]: Finished difference Result 1713 states and 12477 transitions. [2019-01-08 14:43:17,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 14:43:17,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2019-01-08 14:43:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:17,909 INFO L225 Difference]: With dead ends: 1713 [2019-01-08 14:43:17,909 INFO L226 Difference]: Without dead ends: 1711 [2019-01-08 14:43:17,910 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2019-01-08 14:43:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2019-01-08 14:43:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1592. [2019-01-08 14:43:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2019-01-08 14:43:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 12321 transitions. [2019-01-08 14:43:19,684 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 12321 transitions. Word has length 6 [2019-01-08 14:43:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:19,685 INFO L480 AbstractCegarLoop]: Abstraction has 1592 states and 12321 transitions. [2019-01-08 14:43:19,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:43:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 12321 transitions. [2019-01-08 14:43:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:43:19,688 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:19,688 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:43:19,688 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash 912363854, now seen corresponding path program 1 times [2019-01-08 14:43:19,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:19,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:19,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:19,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:19,689 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:19,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:19,770 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:19,770 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:43:19,770 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [28], [32], [33] [2019-01-08 14:43:19,770 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:43:19,771 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:43:20,113 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:43:20,113 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:43:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:20,113 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:43:20,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:20,114 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:43:20,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:20,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:43:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:20,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:20,163 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 14:43:20,165 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:43:20,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,172 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 14:43:20,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:43:20,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,192 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 14:43:20,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:43:20,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,222 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 14:43:20,222 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,281 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,319 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,343 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,363 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,382 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,397 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:43:20,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:43:20,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:43:20,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,605 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,606 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:43:20,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:43:20,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:20,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:43:20,798 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,838 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,878 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,920 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:20,961 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:21,004 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:21,073 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:43:21,074 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:43:21,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,112 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 14:43:21,112 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:21,180 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:43:21,180 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:43:21,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,220 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,223 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 14:43:21,224 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:21,293 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 14:43:21,293 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:43:21,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:21,338 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:21,338 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 158 [2019-01-08 14:43:21,339 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:21,411 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 14:43:21,412 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:43:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:21,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:21,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:43:21,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:43:21,501 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:43:21,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:43:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:43:21,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:43:21,502 INFO L87 Difference]: Start difference. First operand 1592 states and 12321 transitions. Second operand 10 states. [2019-01-08 14:43:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:23,924 INFO L93 Difference]: Finished difference Result 1645 states and 12383 transitions. [2019-01-08 14:43:23,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:43:23,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:43:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:23,932 INFO L225 Difference]: With dead ends: 1645 [2019-01-08 14:43:23,932 INFO L226 Difference]: Without dead ends: 1644 [2019-01-08 14:43:23,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:43:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2019-01-08 14:43:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1592. [2019-01-08 14:43:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2019-01-08 14:43:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 12321 transitions. [2019-01-08 14:43:25,742 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 12321 transitions. Word has length 6 [2019-01-08 14:43:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:25,743 INFO L480 AbstractCegarLoop]: Abstraction has 1592 states and 12321 transitions. [2019-01-08 14:43:25,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:43:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 12321 transitions. [2019-01-08 14:43:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:43:25,747 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:25,747 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:43:25,747 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:25,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:25,747 INFO L82 PathProgramCache]: Analyzing trace with hash 914349408, now seen corresponding path program 1 times [2019-01-08 14:43:25,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:25,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:25,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:25,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:25,748 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:25,773 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 14:43:25,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:25,773 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:25,773 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:43:25,773 INFO L207 CegarAbsIntRunner]: [0], [28], [32], [34], [36], [37] [2019-01-08 14:43:25,774 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:43:25,774 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:43:27,176 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:43:27,176 INFO L272 AbstractInterpreter]: Visited 6 different actions 14 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:43:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:27,177 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:43:27,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:27,177 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:43:27,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:27,185 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:43:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:27,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:27,217 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 14:43:27,220 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 14:43:27,227 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 29 treesize of output 35 [2019-01-08 14:43:27,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,239 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 14:43:27,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,252 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 14:43:27,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,267 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 14:43:27,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,276 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 112 [2019-01-08 14:43:27,281 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,337 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,368 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,389 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,405 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,424 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,439 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,478 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 80 treesize of output 83 [2019-01-08 14:43:27,480 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 79 treesize of output 65 [2019-01-08 14:43:27,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,507 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 76 [2019-01-08 14:43:27,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 83 [2019-01-08 14:43:27,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,635 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 97 [2019-01-08 14:43:27,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:27,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 77 [2019-01-08 14:43:27,739 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,775 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,811 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,847 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,886 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,925 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:27,988 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 14:43:27,988 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 7 variables, input treesize:107, output treesize:112 [2019-01-08 14:43:28,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:28,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 118 [2019-01-08 14:43:28,013 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:28,074 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 14:43:28,074 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:122, output treesize:88 [2019-01-08 14:43:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:28,134 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:28,144 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 14:43:28,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:43:28,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:43:28,163 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:43:28,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:43:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:43:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:43:28,164 INFO L87 Difference]: Start difference. First operand 1592 states and 12321 transitions. Second operand 6 states. [2019-01-08 14:43:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:30,140 INFO L93 Difference]: Finished difference Result 1610 states and 12338 transitions. [2019-01-08 14:43:30,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:43:30,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-01-08 14:43:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:30,147 INFO L225 Difference]: With dead ends: 1610 [2019-01-08 14:43:30,147 INFO L226 Difference]: Without dead ends: 1609 [2019-01-08 14:43:30,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:43:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2019-01-08 14:43:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1592. [2019-01-08 14:43:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1592 states. [2019-01-08 14:43:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 12321 transitions. [2019-01-08 14:43:31,748 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 12321 transitions. Word has length 6 [2019-01-08 14:43:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:31,748 INFO L480 AbstractCegarLoop]: Abstraction has 1592 states and 12321 transitions. [2019-01-08 14:43:31,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:43:31,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 12321 transitions. [2019-01-08 14:43:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:43:31,751 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:31,751 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:43:31,751 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:31,751 INFO L82 PathProgramCache]: Analyzing trace with hash 913930348, now seen corresponding path program 1 times [2019-01-08 14:43:31,751 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:31,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:31,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:31,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:31,752 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:31,797 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 14:43:31,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:31,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:31,797 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:43:31,798 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [32], [34], [35] [2019-01-08 14:43:31,798 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:43:31,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:43:32,078 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:43:32,078 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:43:32,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:32,078 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:43:32,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:32,079 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:43:32,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:32,086 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:43:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:32,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:32,114 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 14:43:32,118 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 14:43:32,122 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 29 treesize of output 35 [2019-01-08 14:43:32,130 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,137 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 14:43:32,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:43:32,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 89 [2019-01-08 14:43:32,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:43:32,176 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,212 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,240 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,263 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,279 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,297 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,313 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,349 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 57 treesize of output 63 [2019-01-08 14:43:32,351 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 59 treesize of output 48 [2019-01-08 14:43:32,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,374 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 41 treesize of output 62 [2019-01-08 14:43:32,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,423 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:43:32,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,483 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,485 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:43:32,491 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,514 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,536 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,559 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,583 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:32,627 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 14:43:32,627 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:84, output treesize:88 [2019-01-08 14:43:32,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:32,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 112 [2019-01-08 14:43:32,725 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-08 14:43:32,739 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-08 14:43:33,449 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 35 dim-0 vars, and 9 xjuncts. [2019-01-08 14:43:33,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:98, output treesize:703 [2019-01-08 14:43:35,720 WARN L181 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 343 DAG size of output: 118 [2019-01-08 14:43:35,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 98 [2019-01-08 14:43:35,730 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:35,878 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:35,886 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:35,887 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 113 [2019-01-08 14:43:35,888 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:36,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:36,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 123 [2019-01-08 14:43:36,022 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:36,139 INFO L267 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 3 xjuncts. [2019-01-08 14:43:36,139 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 17 variables, input treesize:247, output treesize:169 [2019-01-08 14:43:41,650 WARN L181 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 104 [2019-01-08 14:43:41,657 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 14:43:41,657 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:41,696 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 14:43:41,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:43:41,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:43:41,716 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:43:41,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:43:41,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:43:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:43:41,717 INFO L87 Difference]: Start difference. First operand 1592 states and 12321 transitions. Second operand 8 states. [2019-01-08 14:43:48,521 WARN L181 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 115 DAG size of output: 89 [2019-01-08 14:43:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:51,182 INFO L93 Difference]: Finished difference Result 1654 states and 12397 transitions. [2019-01-08 14:43:51,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:43:51,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:43:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:51,189 INFO L225 Difference]: With dead ends: 1654 [2019-01-08 14:43:51,189 INFO L226 Difference]: Without dead ends: 1653 [2019-01-08 14:43:51,190 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:43:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2019-01-08 14:43:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1593. [2019-01-08 14:43:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1593 states. [2019-01-08 14:43:52,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 12329 transitions. [2019-01-08 14:43:52,890 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 12329 transitions. Word has length 6 [2019-01-08 14:43:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:52,891 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 12329 transitions. [2019-01-08 14:43:52,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:43:52,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 12329 transitions. [2019-01-08 14:43:52,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:43:52,893 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:52,894 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:43:52,894 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash 913674658, now seen corresponding path program 2 times [2019-01-08 14:43:52,894 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:52,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:52,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:52,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:52,895 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:52,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:52,964 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:52,965 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:43:52,965 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:43:52,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:52,965 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:43:52,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:43:52,974 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:43:52,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:43:52,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:43:52,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:53,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:43:53,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:43:53,115 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:43:53,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,194 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:43:53,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:43:53,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:43:53,394 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,447 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,495 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,543 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,593 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,640 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:43:53,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 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 14:43:53,706 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:43:53,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:43:53,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:43:53,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 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 14:43:53,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 120 [2019-01-08 14:43:53,717 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,770 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,801 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,825 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,844 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,858 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,873 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:53,941 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 14:43:53,942 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:118, output treesize:120 [2019-01-08 14:43:53,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:53,971 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 14:43:53,971 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:54,036 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 14:43:54,037 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-08 14:43:54,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,078 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 14:43:54,078 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:54,147 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 14:43:54,147 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:106, output treesize:76 [2019-01-08 14:43:54,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,185 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:54,189 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:43:54,190 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 152 [2019-01-08 14:43:54,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:54,258 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 14:43:54,258 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:43:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:54,299 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:43:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:43:54,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:43:54,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:43:54,342 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:43:54,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:43:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:43:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:43:54,343 INFO L87 Difference]: Start difference. First operand 1593 states and 12329 transitions. Second operand 10 states. [2019-01-08 14:43:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:43:57,212 INFO L93 Difference]: Finished difference Result 2255 states and 17098 transitions. [2019-01-08 14:43:57,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-08 14:43:57,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2019-01-08 14:43:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:43:57,221 INFO L225 Difference]: With dead ends: 2255 [2019-01-08 14:43:57,221 INFO L226 Difference]: Without dead ends: 2254 [2019-01-08 14:43:57,222 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:43:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2019-01-08 14:43:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2076. [2019-01-08 14:43:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2019-01-08 14:43:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 16238 transitions. [2019-01-08 14:43:59,349 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 16238 transitions. Word has length 6 [2019-01-08 14:43:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:43:59,349 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 16238 transitions. [2019-01-08 14:43:59,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:43:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 16238 transitions. [2019-01-08 14:43:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:43:59,353 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:43:59,353 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:43:59,353 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:43:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash 914168676, now seen corresponding path program 1 times [2019-01-08 14:43:59,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:43:59,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:59,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:43:59,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:43:59,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:43:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:59,396 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 14:43:59,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:59,397 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:43:59,397 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:43:59,397 INFO L207 CegarAbsIntRunner]: [0], [26], [28], [32], [34], [35] [2019-01-08 14:43:59,397 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:43:59,397 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:43:59,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:43:59,637 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:43:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:43:59,637 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:43:59,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:43:59,637 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:43:59,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:43:59,707 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:43:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:43:59,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:43:59,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 63 [2019-01-08 14:43:59,735 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 59 treesize of output 48 [2019-01-08 14:43:59,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,759 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 41 treesize of output 62 [2019-01-08 14:43:59,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:43:59,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:43:59,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:43:59,876 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:43:59,898 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:59,921 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:59,947 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:43:59,972 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,004 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:44:00,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:44:00,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 14:44:00,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 14:44:00,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 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 14:44:00,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:44:00,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:44:00,038 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,071 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,098 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,118 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,134 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,149 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,163 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:00,207 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 14:44:00,208 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:84, output treesize:88 [2019-01-08 14:44:00,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:00,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 112 [2019-01-08 14:44:00,300 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-08 14:44:00,309 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-08 14:44:01,012 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 35 dim-0 vars, and 9 xjuncts. [2019-01-08 14:44:01,013 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:98, output treesize:703 [2019-01-08 14:44:01,199 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 118 [2019-01-08 14:44:01,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,210 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:01,211 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 117 [2019-01-08 14:44:01,212 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:01,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 102 [2019-01-08 14:44:01,370 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:01,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:01,516 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 131 [2019-01-08 14:44:01,517 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:01,647 INFO L267 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 3 xjuncts. [2019-01-08 14:44:01,647 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 17 variables, input treesize:247, output treesize:173 [2019-01-08 14:44:03,598 WARN L181 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 106 [2019-01-08 14:44:03,605 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 14:44:03,605 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:03,646 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 14:44:03,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:03,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:44:03,665 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:03,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:44:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:44:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:44:03,666 INFO L87 Difference]: Start difference. First operand 2076 states and 16238 transitions. Second operand 8 states. [2019-01-08 14:44:06,458 WARN L181 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2019-01-08 14:44:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:44:12,148 INFO L93 Difference]: Finished difference Result 2130 states and 16289 transitions. [2019-01-08 14:44:12,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:44:12,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2019-01-08 14:44:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:44:12,157 INFO L225 Difference]: With dead ends: 2130 [2019-01-08 14:44:12,157 INFO L226 Difference]: Without dead ends: 2129 [2019-01-08 14:44:12,158 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2019-01-08 14:44:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2019-01-08 14:44:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2076. [2019-01-08 14:44:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2019-01-08 14:44:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 16238 transitions. [2019-01-08 14:44:14,285 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 16238 transitions. Word has length 6 [2019-01-08 14:44:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:44:14,285 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 16238 transitions. [2019-01-08 14:44:14,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:44:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 16238 transitions. [2019-01-08 14:44:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-08 14:44:14,289 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:44:14,289 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-08 14:44:14,289 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:44:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash 901420114, now seen corresponding path program 1 times [2019-01-08 14:44:14,289 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:44:14,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:14,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:14,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:14,290 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:44:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:14,320 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 14:44:14,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:14,320 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:44:14,320 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2019-01-08 14:44:14,320 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [34], [36], [37] [2019-01-08 14:44:14,321 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:44:14,321 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:44:14,485 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:44:14,485 INFO L272 AbstractInterpreter]: Visited 6 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-08 14:44:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:14,485 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:44:14,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:14,485 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:44:14,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:14,494 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:44:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:14,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:44:14,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,529 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 57 treesize of output 63 [2019-01-08 14:44:14,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 48 [2019-01-08 14:44:14,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,563 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 41 treesize of output 62 [2019-01-08 14:44:14,607 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,609 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:44:14,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:14,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:44:14,697 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,728 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,758 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,793 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,831 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:44:14,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:44:14,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 14:44:14,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 14:44:14,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 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 14:44:14,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:44:14,912 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:44:14,913 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,948 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,975 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:14,995 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:15,010 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:15,026 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:15,040 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:15,084 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 14:44:15,084 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:84, output treesize:88 [2019-01-08 14:44:15,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:15,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 97 [2019-01-08 14:44:15,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2019-01-08 14:44:15,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-08 14:44:15,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:93, output treesize:200 [2019-01-08 14:44:15,373 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 14:44:15,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:15,382 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 14:44:15,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:15,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-08 14:44:15,400 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:15,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-08 14:44:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-08 14:44:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-08 14:44:15,401 INFO L87 Difference]: Start difference. First operand 2076 states and 16238 transitions. Second operand 6 states. [2019-01-08 14:44:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:44:17,681 INFO L93 Difference]: Finished difference Result 2093 states and 16254 transitions. [2019-01-08 14:44:17,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-08 14:44:17,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-01-08 14:44:17,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:44:17,690 INFO L225 Difference]: With dead ends: 2093 [2019-01-08 14:44:17,690 INFO L226 Difference]: Without dead ends: 2092 [2019-01-08 14:44:17,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-08 14:44:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2019-01-08 14:44:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 2076. [2019-01-08 14:44:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2019-01-08 14:44:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 16238 transitions. [2019-01-08 14:44:19,968 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 16238 transitions. Word has length 6 [2019-01-08 14:44:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:44:19,968 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 16238 transitions. [2019-01-08 14:44:19,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-08 14:44:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 16238 transitions. [2019-01-08 14:44:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:44:19,972 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:44:19,972 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:44:19,972 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:44:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:19,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2030609704, now seen corresponding path program 1 times [2019-01-08 14:44:19,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:44:19,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:19,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:19,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:19,973 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:44:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:44:20,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:20,079 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:44:20,079 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:44:20,080 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [26], [32], [33] [2019-01-08 14:44:20,082 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:44:20,082 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:44:20,479 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:44:20,480 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:44:20,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:20,480 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:44:20,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:20,480 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:44:20,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:20,488 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:44:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:20,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:44:20,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:44:20,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:44:20,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,629 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:44:20,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:44:20,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:20,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:44:20,756 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,783 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,809 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,834 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,861 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:44:20,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:44:20,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:44:20,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:44:20,905 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:44:20,907 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 14:44:20,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:44:20,917 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,955 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:20,983 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,005 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,023 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,037 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,051 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,098 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:21,098 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:44:21,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,175 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:44:21,175 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,219 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:21,219 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:44:21,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:44:21,260 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,391 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:21,391 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:44:21,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,441 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:21,441 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:44:21,442 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,489 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:21,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:44:21,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,534 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:21,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:21,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:44:21,537 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:21,587 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 14:44:21,587 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2019-01-08 14:44:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:21,613 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:21,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:21,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:44:21,688 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:21,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:44:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:44:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:44:21,689 INFO L87 Difference]: Start difference. First operand 2076 states and 16238 transitions. Second operand 11 states. [2019-01-08 14:44:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:44:24,900 INFO L93 Difference]: Finished difference Result 2217 states and 16916 transitions. [2019-01-08 14:44:24,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:44:24,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:44:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:44:24,910 INFO L225 Difference]: With dead ends: 2217 [2019-01-08 14:44:24,910 INFO L226 Difference]: Without dead ends: 2215 [2019-01-08 14:44:24,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:44:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2019-01-08 14:44:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2119. [2019-01-08 14:44:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2119 states. [2019-01-08 14:44:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 16593 transitions. [2019-01-08 14:44:27,329 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 16593 transitions. Word has length 7 [2019-01-08 14:44:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:44:27,329 INFO L480 AbstractCegarLoop]: Abstraction has 2119 states and 16593 transitions. [2019-01-08 14:44:27,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:44:27,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 16593 transitions. [2019-01-08 14:44:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:44:27,332 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:44:27,332 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:44:27,333 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:44:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2030607782, now seen corresponding path program 1 times [2019-01-08 14:44:27,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:44:27,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:27,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:27,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:27,333 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:44:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:44:27,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:27,409 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:44:27,409 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:44:27,409 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [32], [33] [2019-01-08 14:44:27,410 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:44:27,410 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:44:27,779 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:44:27,779 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:44:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:27,780 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:44:27,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:27,780 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:44:27,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:27,788 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:44:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:27,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:44:27,827 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 14:44:27,833 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 14:44:27,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,840 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 14:44:27,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,848 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 14:44:27,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,855 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 14:44:27,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,866 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 14:44:27,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,873 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:27,879 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 14:44:27,880 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:27,939 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:27,974 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:27,997 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,019 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,036 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,051 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:44:28,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:44:28,193 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:44:28,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:44:28,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:44:28,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:44:28,448 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,489 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,529 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,570 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,611 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,650 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,718 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:28,719 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:44:28,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,772 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 14:44:28,772 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,837 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:28,837 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:44:28,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,888 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 14:44:28,889 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:28,961 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:28,961 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:44:28,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:28,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,015 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:29,016 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 148 [2019-01-08 14:44:29,017 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:29,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:29,089 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:44:29,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:29,143 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:29,144 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 152 [2019-01-08 14:44:29,145 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:29,216 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 14:44:29,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:76, output treesize:62 [2019-01-08 14:44:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:29,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:29,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:29,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:44:29,395 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:29,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:44:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:44:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:44:29,396 INFO L87 Difference]: Start difference. First operand 2119 states and 16593 transitions. Second operand 12 states. [2019-01-08 14:44:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:44:32,655 INFO L93 Difference]: Finished difference Result 2206 states and 16848 transitions. [2019-01-08 14:44:32,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:44:32,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:44:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:44:32,665 INFO L225 Difference]: With dead ends: 2206 [2019-01-08 14:44:32,665 INFO L226 Difference]: Without dead ends: 2202 [2019-01-08 14:44:32,665 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:44:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2019-01-08 14:44:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2133. [2019-01-08 14:44:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2133 states. [2019-01-08 14:44:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 16705 transitions. [2019-01-08 14:44:34,922 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 16705 transitions. Word has length 7 [2019-01-08 14:44:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:44:34,922 INFO L480 AbstractCegarLoop]: Abstraction has 2133 states and 16705 transitions. [2019-01-08 14:44:34,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:44:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 16705 transitions. [2019-01-08 14:44:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:44:34,926 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:44:34,926 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:44:34,926 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:44:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2030621236, now seen corresponding path program 1 times [2019-01-08 14:44:34,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:44:34,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:34,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:34,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:34,927 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:44:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:35,287 WARN L181 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2019-01-08 14:44:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:44:35,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:35,335 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:44:35,335 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:44:35,335 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [22], [32], [33] [2019-01-08 14:44:35,336 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:44:35,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:44:35,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:44:35,746 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:44:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:35,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:44:35,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:35,747 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:44:35,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:35,755 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:44:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:35,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:44:35,789 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 14:44:35,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:44:35,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:44:35,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:44:35,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,816 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:44:35,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:35,827 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 14:44:35,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:44:35,841 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:35,884 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:35,918 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:35,943 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:35,962 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:35,978 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:35,992 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:44:36,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,070 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:44:36,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,113 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:44:36,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,172 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:44:36,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:44:36,246 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,273 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,299 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,326 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,353 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,403 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:36,403 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:44:36,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:44:36,481 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,523 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:36,524 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:44:36,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,569 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:44:36,569 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:36,619 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:44:36,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,667 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:36,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2019-01-08 14:44:36,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,719 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:36,720 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2019-01-08 14:44:36,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:36,768 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:36,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2019-01-08 14:44:36,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:36,820 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 14:44:36,820 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2019-01-08 14:44:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:36,850 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:36,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:36,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:44:36,926 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:36,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:44:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:44:36,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:44:36,927 INFO L87 Difference]: Start difference. First operand 2133 states and 16705 transitions. Second operand 11 states. [2019-01-08 14:44:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:44:40,151 INFO L93 Difference]: Finished difference Result 2207 states and 16856 transitions. [2019-01-08 14:44:40,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:44:40,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:44:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:44:40,160 INFO L225 Difference]: With dead ends: 2207 [2019-01-08 14:44:40,160 INFO L226 Difference]: Without dead ends: 2206 [2019-01-08 14:44:40,161 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:44:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2019-01-08 14:44:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 2133. [2019-01-08 14:44:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2133 states. [2019-01-08 14:44:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 16705 transitions. [2019-01-08 14:44:42,707 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 16705 transitions. Word has length 7 [2019-01-08 14:44:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:44:42,707 INFO L480 AbstractCegarLoop]: Abstraction has 2133 states and 16705 transitions. [2019-01-08 14:44:42,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:44:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 16705 transitions. [2019-01-08 14:44:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:44:42,711 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:44:42,711 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:44:42,712 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:44:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2030961366, now seen corresponding path program 1 times [2019-01-08 14:44:42,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:44:42,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:42,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:42,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:42,713 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:44:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:42,905 WARN L181 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2019-01-08 14:44:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:44:43,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:43,039 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:44:43,040 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:44:43,040 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [32], [34], [35] [2019-01-08 14:44:43,041 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:44:43,041 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:44:43,366 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:44:43,366 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:44:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:43,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:44:43,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:43,367 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:44:43,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:43,375 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:44:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:43,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:44:43,402 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 14:44:43,406 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 14:44:43,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,415 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 14:44:43,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,422 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 14:44:43,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,431 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 14:44:43,434 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,440 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 14:44:43,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:44:43,453 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,495 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,529 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,555 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,574 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,592 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,608 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,644 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:44:43,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:44:43,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:44:43,784 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:44:43,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:43,863 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:44:43,864 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,890 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,917 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,943 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:43,968 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:44,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:44,018 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:44:44,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:44:44,080 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:44,123 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:44,124 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:44:44,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:44:44,164 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:44,213 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:44,214 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:44:44,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,254 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:44,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:44,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:44:44,257 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:44,307 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 14:44:44,308 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:44:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:44,334 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:44,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:44,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2019-01-08 14:44:44,391 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:44,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:44:44,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:44:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:44:44,392 INFO L87 Difference]: Start difference. First operand 2133 states and 16705 transitions. Second operand 11 states. [2019-01-08 14:44:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:44:48,005 INFO L93 Difference]: Finished difference Result 2338 states and 17781 transitions. [2019-01-08 14:44:48,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:44:48,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:44:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:44:48,016 INFO L225 Difference]: With dead ends: 2338 [2019-01-08 14:44:48,016 INFO L226 Difference]: Without dead ends: 2337 [2019-01-08 14:44:48,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:44:48,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2019-01-08 14:44:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2202. [2019-01-08 14:44:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2202 states. [2019-01-08 14:44:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 17270 transitions. [2019-01-08 14:44:50,823 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 17270 transitions. Word has length 7 [2019-01-08 14:44:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:44:50,823 INFO L480 AbstractCegarLoop]: Abstraction has 2202 states and 17270 transitions. [2019-01-08 14:44:50,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:44:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 17270 transitions. [2019-01-08 14:44:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:44:50,827 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:44:50,827 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:44:50,827 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:44:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2030965274, now seen corresponding path program 1 times [2019-01-08 14:44:50,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:44:50,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:50,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:50,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:44:50,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:44:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:44:50,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:50,965 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:44:50,965 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:44:50,966 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [32], [33] [2019-01-08 14:44:50,966 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:44:50,966 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:44:51,331 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:44:51,331 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:44:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:44:51,332 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:44:51,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:44:51,332 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:44:51,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:44:51,341 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:44:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:44:51,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:44:51,377 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 14:44:51,380 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:44:51,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,388 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 14:44:51,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,395 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 14:44:51,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,403 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 14:44:51,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,416 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 14:44:51,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:44:51,427 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,468 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,500 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,527 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,548 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,581 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:44:51,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:44:51,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:44:51,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:44:51,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:51,830 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:44:51,830 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,857 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,883 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,910 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,937 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:44:51,987 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:44:51,987 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:44:52,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,037 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:44:52,038 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:44:52,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:44:52,193 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-08 14:44:52,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,275 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 88 treesize of output 134 [2019-01-08 14:44:52,276 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:44:52,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,530 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 83 treesize of output 121 [2019-01-08 14:44:52,531 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:52,662 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 3 xjuncts. [2019-01-08 14:44:52,662 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:172, output treesize:177 [2019-01-08 14:44:52,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,745 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:52,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:52,756 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 143 [2019-01-08 14:44:52,758 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:44:53,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,053 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,060 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,061 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:53,061 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 67 treesize of output 150 [2019-01-08 14:44:53,062 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:53,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,265 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:53,266 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 67 treesize of output 128 [2019-01-08 14:44:53,267 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:53,413 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 4 xjuncts. [2019-01-08 14:44:53,414 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:207, output treesize:199 [2019-01-08 14:44:53,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,526 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:53,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,528 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 61 treesize of output 117 [2019-01-08 14:44:53,528 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:53,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,698 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:53,726 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:53,749 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 66 treesize of output 162 [2019-01-08 14:44:53,752 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 8 xjuncts. [2019-01-08 14:44:54,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,306 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:44:54,306 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 61 treesize of output 123 [2019-01-08 14:44:54,307 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:54,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,564 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:44:54,576 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 61 treesize of output 131 [2019-01-08 14:44:54,577 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:44:54,806 INFO L267 ElimStorePlain]: Start of recursive call 1: 21 dim-0 vars, 4 dim-1 vars, End of recursive call: 36 dim-0 vars, and 7 xjuncts. [2019-01-08 14:44:54,807 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 25 variables, input treesize:250, output treesize:367 [2019-01-08 14:44:55,288 WARN L181 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 133 [2019-01-08 14:44:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:55,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:44:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:44:55,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:44:55,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:44:55,530 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:44:55,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:44:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:44:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:44:55,531 INFO L87 Difference]: Start difference. First operand 2202 states and 17270 transitions. Second operand 12 states. [2019-01-08 14:44:58,941 WARN L181 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2019-01-08 14:45:00,886 WARN L181 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 136 [2019-01-08 14:45:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:45:10,419 INFO L93 Difference]: Finished difference Result 2761 states and 21059 transitions. [2019-01-08 14:45:10,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:45:10,420 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:45:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:45:10,430 INFO L225 Difference]: With dead ends: 2761 [2019-01-08 14:45:10,430 INFO L226 Difference]: Without dead ends: 2760 [2019-01-08 14:45:10,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=129, Invalid=290, Unknown=1, NotChecked=0, Total=420 [2019-01-08 14:45:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2019-01-08 14:45:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2422. [2019-01-08 14:45:13,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2422 states. [2019-01-08 14:45:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 19070 transitions. [2019-01-08 14:45:13,729 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 19070 transitions. Word has length 7 [2019-01-08 14:45:13,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:45:13,729 INFO L480 AbstractCegarLoop]: Abstraction has 2422 states and 19070 transitions. [2019-01-08 14:45:13,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:45:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 19070 transitions. [2019-01-08 14:45:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:45:13,733 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:45:13,733 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:45:13,733 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:45:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2030484710, now seen corresponding path program 1 times [2019-01-08 14:45:13,733 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:45:13,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:13,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:13,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:13,734 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:45:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:45:13,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:13,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:45:13,793 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:45:13,793 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [26], [32], [34], [35] [2019-01-08 14:45:13,793 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:45:13,794 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:45:14,078 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:45:14,079 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:45:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:14,079 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:45:14,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:14,079 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:45:14,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:14,089 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:45:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:14,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:45:14,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:45:14,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:45:14,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:45:14,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:45:14,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,332 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:45:14,332 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,360 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,386 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,414 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,440 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:45:14,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 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 14:45:14,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 14:45:14,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:45:14,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:45:14,490 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 14:45:14,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:45:14,498 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,537 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,568 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,589 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,608 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,623 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,638 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,687 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:14,687 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:45:14,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:45:14,751 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,795 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:14,795 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:45:14,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,838 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:45:14,839 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,887 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:14,887 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:45:14,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,929 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:14,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:14,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:45:14,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:14,983 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:14,984 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:45:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:15,010 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:45:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:15,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:45:15,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-08 14:45:15,062 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:45:15,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:45:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:45:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-01-08 14:45:15,063 INFO L87 Difference]: Start difference. First operand 2422 states and 19070 transitions. Second operand 10 states. [2019-01-08 14:45:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:45:19,044 INFO L93 Difference]: Finished difference Result 2533 states and 19536 transitions. [2019-01-08 14:45:19,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:45:19,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:45:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:45:19,054 INFO L225 Difference]: With dead ends: 2533 [2019-01-08 14:45:19,054 INFO L226 Difference]: Without dead ends: 2532 [2019-01-08 14:45:19,055 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:45:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2019-01-08 14:45:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2458. [2019-01-08 14:45:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2458 states. [2019-01-08 14:45:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 19358 transitions. [2019-01-08 14:45:22,439 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 19358 transitions. Word has length 7 [2019-01-08 14:45:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:45:22,439 INFO L480 AbstractCegarLoop]: Abstraction has 2458 states and 19358 transitions. [2019-01-08 14:45:22,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:45:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 19358 transitions. [2019-01-08 14:45:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:45:22,443 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:45:22,443 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:45:22,443 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:45:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2030488618, now seen corresponding path program 1 times [2019-01-08 14:45:22,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:45:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:22,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:22,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:22,444 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:45:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:45:22,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:22,587 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:45:22,588 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:45:22,588 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [26], [28], [32], [33] [2019-01-08 14:45:22,588 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:45:22,588 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:45:22,953 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:45:22,953 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:45:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:22,953 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:45:22,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:22,953 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:45:22,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:22,963 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:45:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:22,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:45:23,005 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 14:45:23,008 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 14:45:23,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,013 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 14:45:23,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,020 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 14:45:23,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,028 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 14:45:23,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,040 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 14:45:23,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,053 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 14:45:23,054 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,112 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,147 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,173 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,193 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,209 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,226 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:45:23,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:45:23,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:45:23,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:45:23,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:45:23,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:45:23,620 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,658 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,698 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,739 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,780 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,821 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:23,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:23,890 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:45:23,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:23,939 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 14:45:23,939 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:24,004 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:24,005 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:45:24,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,053 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 14:45:24,054 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:24,122 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:24,123 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:45:24,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,170 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:24,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,172 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 151 [2019-01-08 14:45:24,173 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:24,246 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 14:45:24,247 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:64 [2019-01-08 14:45:24,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,288 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:24,299 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:24,300 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 50 treesize of output 160 [2019-01-08 14:45:24,301 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:24,376 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 14:45:24,376 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:60 [2019-01-08 14:45:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:24,654 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:45:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:24,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:45:24,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:45:24,742 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:45:24,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:45:24,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:45:24,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:45:24,743 INFO L87 Difference]: Start difference. First operand 2458 states and 19358 transitions. Second operand 11 states. [2019-01-08 14:45:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:45:28,912 INFO L93 Difference]: Finished difference Result 2591 states and 20042 transitions. [2019-01-08 14:45:28,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:45:28,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:45:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:45:28,921 INFO L225 Difference]: With dead ends: 2591 [2019-01-08 14:45:28,921 INFO L226 Difference]: Without dead ends: 2588 [2019-01-08 14:45:28,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:45:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2019-01-08 14:45:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2533. [2019-01-08 14:45:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2533 states. [2019-01-08 14:45:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 19974 transitions. [2019-01-08 14:45:32,303 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 19974 transitions. Word has length 7 [2019-01-08 14:45:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:45:32,303 INFO L480 AbstractCegarLoop]: Abstraction has 2533 states and 19974 transitions. [2019-01-08 14:45:32,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:45:32,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 19974 transitions. [2019-01-08 14:45:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:45:32,307 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:45:32,307 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:45:32,307 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:45:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:32,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2030502072, now seen corresponding path program 1 times [2019-01-08 14:45:32,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:45:32,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:32,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:32,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:32,308 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:45:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:45:32,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:32,376 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:45:32,376 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:45:32,376 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [26], [32], [33] [2019-01-08 14:45:32,378 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:45:32,378 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:45:32,726 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:45:32,726 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:45:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:32,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:45:32,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:32,727 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:45:32,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:32,734 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:45:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:32,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:45:32,766 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 14:45:32,768 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 14:45:32,771 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,773 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 14:45:32,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,781 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 14:45:32,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,790 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 14:45:32,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:32,799 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 14:45:32,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:45:32,810 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:32,851 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:32,885 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:32,912 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:32,933 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:32,951 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:32,968 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,005 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:45:33,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,044 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:45:33,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,088 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:45:33,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:45:33,209 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,215 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:45:33,216 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,243 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,269 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,296 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,323 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:33,371 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:45:33,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:45:33,452 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,494 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:33,494 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:45:33,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2019-01-08 14:45:33,536 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,585 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:33,585 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:45:33,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,627 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:33,628 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:45:33,629 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:33,681 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:45:33,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:33,727 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:33,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 131 [2019-01-08 14:45:33,728 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:33,783 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 14:45:33,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-08 14:45:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:33,810 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:45:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:33,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:45:33,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:45:33,969 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:45:33,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:45:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:45:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:45:33,969 INFO L87 Difference]: Start difference. First operand 2533 states and 19974 transitions. Second operand 12 states. [2019-01-08 14:45:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:45:38,393 INFO L93 Difference]: Finished difference Result 2655 states and 20595 transitions. [2019-01-08 14:45:38,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:45:38,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:45:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:45:38,404 INFO L225 Difference]: With dead ends: 2655 [2019-01-08 14:45:38,404 INFO L226 Difference]: Without dead ends: 2654 [2019-01-08 14:45:38,405 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:45:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2019-01-08 14:45:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2592. [2019-01-08 14:45:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2592 states. [2019-01-08 14:45:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 20459 transitions. [2019-01-08 14:45:42,144 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 20459 transitions. Word has length 7 [2019-01-08 14:45:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:45:42,144 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 20459 transitions. [2019-01-08 14:45:42,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:45:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 20459 transitions. [2019-01-08 14:45:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:45:42,148 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:45:42,148 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:45:42,148 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:45:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash -2030446334, now seen corresponding path program 2 times [2019-01-08 14:45:42,148 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:45:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:42,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:42,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:42,149 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:45:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:45:42,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:42,350 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:45:42,350 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:45:42,350 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:45:42,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:42,350 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:45:42,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:45:42,360 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:45:42,366 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-01-08 14:45:42,367 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:45:42,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:45:42,397 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 14:45:42,400 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 14:45:42,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 14:45:42,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,414 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 14:45:42,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,421 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 14:45:42,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,431 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 14:45:42,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,436 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,441 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 14:45:42,442 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,502 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,535 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,561 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,581 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,598 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,614 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:42,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:45:42,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:45:42,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:45:42,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,822 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,824 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:45:42,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,902 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:42,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:45:42,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,009 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,011 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:45:43,011 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,050 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,090 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,131 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,172 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,212 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:43,281 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:45:43,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:45:43,318 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,384 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:43,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:45:43,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,417 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,426 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 14:45:43,427 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,497 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 14:45:43,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:45:43,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,544 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:43,545 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 158 [2019-01-08 14:45:43,546 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,619 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 14:45:43,620 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:88, output treesize:66 [2019-01-08 14:45:43,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,670 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:43,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:43,672 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 151 [2019-01-08 14:45:43,672 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:43,743 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 14:45:43,743 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:76, output treesize:56 [2019-01-08 14:45:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:43,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:45:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:43,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:45:43,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2019-01-08 14:45:43,887 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:45:43,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:45:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:45:43,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:45:43,888 INFO L87 Difference]: Start difference. First operand 2592 states and 20459 transitions. Second operand 12 states. [2019-01-08 14:45:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:45:49,698 INFO L93 Difference]: Finished difference Result 3772 states and 29475 transitions. [2019-01-08 14:45:49,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:45:49,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:45:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:45:49,712 INFO L225 Difference]: With dead ends: 3772 [2019-01-08 14:45:49,712 INFO L226 Difference]: Without dead ends: 3771 [2019-01-08 14:45:49,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:45:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2019-01-08 14:45:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3518. [2019-01-08 14:45:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3518 states. [2019-01-08 14:45:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 28047 transitions. [2019-01-08 14:45:54,371 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 28047 transitions. Word has length 7 [2019-01-08 14:45:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:45:54,372 INFO L480 AbstractCegarLoop]: Abstraction has 3518 states and 28047 transitions. [2019-01-08 14:45:54,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:45:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 28047 transitions. [2019-01-08 14:45:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:45:54,377 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:45:54,377 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:45:54,377 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:45:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2030442490, now seen corresponding path program 1 times [2019-01-08 14:45:54,378 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:45:54,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:54,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:45:54,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:45:54,378 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:45:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:45:54,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:54,438 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:45:54,438 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:45:54,438 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [32], [33] [2019-01-08 14:45:54,439 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:45:54,439 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:45:54,803 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:45:54,803 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:45:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:45:54,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:45:54,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:45:54,804 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:45:54,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:45:54,812 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:45:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:45:54,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:45:54,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,854 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:45:54,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,904 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:45:54,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:54,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:45:55,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,029 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:45:55,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,117 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:45:55,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,212 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,214 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:45:55,226 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,271 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,320 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,372 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,420 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,468 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,526 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:45:55,529 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:45:55,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:45:55,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:45:55,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:45:55,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 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 14:45:55,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 14:45:55,544 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,597 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,627 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,651 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,670 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,686 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,700 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,769 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:55,769 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:45:55,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,816 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 14:45:55,816 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:55,881 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:55,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:45:55,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,926 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,927 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:55,930 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 14:45:55,930 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:56,002 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:45:56,002 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:45:56,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,053 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:56,054 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 158 [2019-01-08 14:45:56,055 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:56,128 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 14:45:56,128 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:45:56,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,170 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,172 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:45:56,179 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:45:56,180 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 158 [2019-01-08 14:45:56,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:45:56,252 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 14:45:56,253 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:76, output treesize:62 [2019-01-08 14:45:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:56,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:45:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:45:56,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:45:56,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2019-01-08 14:45:56,386 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:45:56,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-01-08 14:45:56,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-01-08 14:45:56,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-01-08 14:45:56,387 INFO L87 Difference]: Start difference. First operand 3518 states and 28047 transitions. Second operand 11 states. [2019-01-08 14:46:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:46:04,218 INFO L93 Difference]: Finished difference Result 3593 states and 28259 transitions. [2019-01-08 14:46:04,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:46:04,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2019-01-08 14:46:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:46:04,232 INFO L225 Difference]: With dead ends: 3593 [2019-01-08 14:46:04,232 INFO L226 Difference]: Without dead ends: 3592 [2019-01-08 14:46:04,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:46:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2019-01-08 14:46:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3536. [2019-01-08 14:46:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3536 states. [2019-01-08 14:46:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 28191 transitions. [2019-01-08 14:46:08,968 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 28191 transitions. Word has length 7 [2019-01-08 14:46:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:46:08,968 INFO L480 AbstractCegarLoop]: Abstraction has 3536 states and 28191 transitions. [2019-01-08 14:46:08,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-01-08 14:46:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 28191 transitions. [2019-01-08 14:46:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:46:08,974 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:46:08,974 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:46:08,974 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:46:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2015527642, now seen corresponding path program 1 times [2019-01-08 14:46:08,974 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:46:08,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:08,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:46:08,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:08,975 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:46:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:09,007 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 14:46:09,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:09,007 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:46:09,008 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:46:09,008 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [34], [36], [37] [2019-01-08 14:46:09,009 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:46:09,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:46:09,230 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:46:09,231 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-08 14:46:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:09,231 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:46:09,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:09,231 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:46:09,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:46:09,239 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:46:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:09,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:46:09,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,263 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 57 treesize of output 63 [2019-01-08 14:46:09,266 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 59 treesize of output 48 [2019-01-08 14:46:09,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,286 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,290 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 41 treesize of output 62 [2019-01-08 14:46:09,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:46:09,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:46:09,407 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,497 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,519 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,545 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,570 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:46:09,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:46:09,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 10 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 14:46:09,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 14:46:09,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 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 14:46:09,628 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 14:46:09,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:46:09,640 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,675 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,702 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,722 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,737 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,753 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,767 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,811 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 14:46:09,811 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:84, output treesize:88 [2019-01-08 14:46:09,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 83 [2019-01-08 14:46:09,848 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,887 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:09,887 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:93, output treesize:63 [2019-01-08 14:46:09,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:09,917 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 97 [2019-01-08 14:46:09,918 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:09,959 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 14:46:09,959 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:75, output treesize:49 [2019-01-08 14:46:09,979 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 14:46:09,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:46:09,999 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 14:46:10,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:46:10,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-08 14:46:10,017 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:46:10,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-08 14:46:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-08 14:46:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-01-08 14:46:10,018 INFO L87 Difference]: Start difference. First operand 3536 states and 28191 transitions. Second operand 8 states. [2019-01-08 14:46:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:46:14,933 INFO L93 Difference]: Finished difference Result 3639 states and 28648 transitions. [2019-01-08 14:46:14,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:46:14,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2019-01-08 14:46:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:46:14,947 INFO L225 Difference]: With dead ends: 3639 [2019-01-08 14:46:14,947 INFO L226 Difference]: Without dead ends: 3638 [2019-01-08 14:46:14,948 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2019-01-08 14:46:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2019-01-08 14:46:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 3588. [2019-01-08 14:46:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3588 states. [2019-01-08 14:46:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 28594 transitions. [2019-01-08 14:46:19,918 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 28594 transitions. Word has length 7 [2019-01-08 14:46:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:46:19,918 INFO L480 AbstractCegarLoop]: Abstraction has 3588 states and 28594 transitions. [2019-01-08 14:46:19,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-08 14:46:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 28594 transitions. [2019-01-08 14:46:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:46:19,923 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:46:19,923 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-01-08 14:46:19,924 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:46:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2016310212, now seen corresponding path program 2 times [2019-01-08 14:46:19,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:46:19,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:19,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:46:19,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:19,924 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:46:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:20,054 WARN L181 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2019-01-08 14:46:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-08 14:46:20,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:20,136 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:46:20,136 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:46:20,136 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:46:20,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:20,136 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:46:20,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:46:20,144 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:46:20,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-01-08 14:46:20,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:46:20,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:46:20,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:46:20,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:46:20,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,291 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:46:20,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,363 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:46:20,437 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:46:20,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:20,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:46:20,562 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,607 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,654 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,701 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,750 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,797 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:46:20,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:46:20,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 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 14:46:20,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:46:20,865 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 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 14:46:20,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:46:20,870 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 14:46:20,870 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,920 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,950 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,973 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:20,991 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,007 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,020 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,085 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:21,086 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 5 variables, input treesize:118, output treesize:120 [2019-01-08 14:46:21,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,123 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 14:46:21,123 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,186 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:21,187 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:130, output treesize:96 [2019-01-08 14:46:21,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,231 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 14:46:21,232 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,302 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 14:46:21,302 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:108, output treesize:78 [2019-01-08 14:46:21,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,349 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:21,350 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 152 [2019-01-08 14:46:21,351 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,424 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 14:46:21,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:46:21,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,469 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:21,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,471 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 147 [2019-01-08 14:46:21,472 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,541 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 14:46:21,541 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:56 [2019-01-08 14:46:21,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,576 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:21,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 164 [2019-01-08 14:46:21,598 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:21,673 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 14:46:21,673 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:70, output treesize:54 [2019-01-08 14:46:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:21,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:46:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:21,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:46:21,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2019-01-08 14:46:21,779 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:46:21,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-01-08 14:46:21,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-01-08 14:46:21,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2019-01-08 14:46:21,780 INFO L87 Difference]: Start difference. First operand 3588 states and 28594 transitions. Second operand 13 states. [2019-01-08 14:46:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:46:31,697 INFO L93 Difference]: Finished difference Result 5824 states and 46117 transitions. [2019-01-08 14:46:31,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-01-08 14:46:31,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2019-01-08 14:46:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:46:31,720 INFO L225 Difference]: With dead ends: 5824 [2019-01-08 14:46:31,721 INFO L226 Difference]: Without dead ends: 5822 [2019-01-08 14:46:31,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:46:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2019-01-08 14:46:38,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 5028. [2019-01-08 14:46:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5028 states. [2019-01-08 14:46:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 40325 transitions. [2019-01-08 14:46:38,116 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 40325 transitions. Word has length 7 [2019-01-08 14:46:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:46:38,116 INFO L480 AbstractCegarLoop]: Abstraction has 5028 states and 40325 transitions. [2019-01-08 14:46:38,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-01-08 14:46:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 40325 transitions. [2019-01-08 14:46:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:46:38,123 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:46:38,123 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:46:38,124 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:46:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:38,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2016185030, now seen corresponding path program 1 times [2019-01-08 14:46:38,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:46:38,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:38,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:46:38,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:38,125 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:46:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:38,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:38,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:46:38,179 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:46:38,179 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [32], [34], [35] [2019-01-08 14:46:38,180 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:46:38,180 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:46:38,463 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:46:38,463 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:46:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:38,464 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:46:38,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:38,464 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:46:38,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:46:38,473 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:46:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:38,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:46:38,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,507 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:46:38,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,551 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:46:38,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:46:38,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:46:38,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:38,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:46:38,728 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,756 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,783 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,811 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,839 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,875 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2019-01-08 14:46:38,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:46:38,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:46:38,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:46:38,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:46:38,889 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 14:46:38,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:46:38,900 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,936 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,966 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:38,990 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,008 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,024 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,038 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,087 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:39,087 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:46:39,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:46:39,146 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,190 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:39,190 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:46:39,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:46:39,227 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,273 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:39,274 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2019-01-08 14:46:39,302 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,303 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,305 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,310 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,313 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:39,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:39,315 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:46:39,315 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:39,367 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 14:46:39,367 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2019-01-08 14:46:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:39,393 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:46:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:39,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:46:39,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:46:39,449 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:46:39,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:46:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:46:39,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:46:39,449 INFO L87 Difference]: Start difference. First operand 5028 states and 40325 transitions. Second operand 10 states. [2019-01-08 14:46:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:46:46,459 INFO L93 Difference]: Finished difference Result 5073 states and 40371 transitions. [2019-01-08 14:46:46,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:46:46,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:46:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:46:46,479 INFO L225 Difference]: With dead ends: 5073 [2019-01-08 14:46:46,480 INFO L226 Difference]: Without dead ends: 5072 [2019-01-08 14:46:46,481 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:46:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2019-01-08 14:46:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 5024. [2019-01-08 14:46:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5024 states. [2019-01-08 14:46:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 40319 transitions. [2019-01-08 14:46:53,026 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 40319 transitions. Word has length 7 [2019-01-08 14:46:53,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:46:53,027 INFO L480 AbstractCegarLoop]: Abstraction has 5024 states and 40319 transitions. [2019-01-08 14:46:53,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:46:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 40319 transitions. [2019-01-08 14:46:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:46:53,034 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:46:53,034 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:46:53,034 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:46:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2016190986, now seen corresponding path program 1 times [2019-01-08 14:46:53,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:46:53,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:53,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:46:53,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:46:53,035 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:46:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:53,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:53,271 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:46:53,271 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:46:53,272 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [26], [28], [31] [2019-01-08 14:46:53,273 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:46:53,273 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:46:53,749 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:46:53,749 INFO L272 AbstractInterpreter]: Visited 7 different actions 13 times. Merged at 1 different actions 1 times. Never widened. Found 10 fixpoints after 6 different actions. Largest state had 0 variables. [2019-01-08 14:46:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:46:53,749 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:46:53,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:46:53,749 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:46:53,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:46:53,758 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:46:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:46:53,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:46:53,787 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 14:46:53,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:46:53,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2019-01-08 14:46:53,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,803 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 14:46:53,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,810 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:46:53,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:53,823 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 14:46:53,833 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:46:53,834 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:53,876 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:53,910 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:53,937 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:53,957 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:53,971 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:53,986 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:54,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:46:54,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:46:54,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,109 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:46:54,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,166 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:46:54,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:46:54,238 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:54,264 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:54,290 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:54,316 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:54,343 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:46:54,393 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:46:54,393 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:95, output treesize:96 [2019-01-08 14:46:54,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:46:54,460 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:46:54,613 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-01-08 14:46:54,613 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:106, output treesize:150 [2019-01-08 14:46:54,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,730 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 88 treesize of output 142 [2019-01-08 14:46:54,731 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:46:54,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:54,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 105 [2019-01-08 14:46:54,978 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:55,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 3 xjuncts. [2019-01-08 14:46:55,098 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:172, output treesize:177 [2019-01-08 14:46:55,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,250 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:55,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 139 [2019-01-08 14:46:55,262 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:46:55,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,559 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:55,560 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 67 treesize of output 128 [2019-01-08 14:46:55,561 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:55,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:55,732 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:55,733 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 67 treesize of output 134 [2019-01-08 14:46:55,734 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:55,876 INFO L267 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 3 dim-1 vars, End of recursive call: 13 dim-0 vars, and 4 xjuncts. [2019-01-08 14:46:55,876 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:207, output treesize:198 [2019-01-08 14:46:56,027 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2019-01-08 14:46:56,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,043 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,057 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:56,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,067 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 2 case distinctions, treesize of input 66 treesize of output 145 [2019-01-08 14:46:56,069 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:46:56,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,362 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:56,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,364 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 61 treesize of output 120 [2019-01-08 14:46:56,365 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:56,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,542 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:56,543 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 61 treesize of output 134 [2019-01-08 14:46:56,544 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:56,693 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 17 dim-0 vars, and 4 xjuncts. [2019-01-08 14:46:56,693 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:189, output treesize:206 [2019-01-08 14:46:56,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,843 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,853 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,855 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:56,857 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:56,874 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 4 case distinctions, treesize of input 68 treesize of output 152 [2019-01-08 14:46:56,876 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2019-01-08 14:46:57,222 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,238 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,240 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,241 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:46:57,241 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 63 treesize of output 135 [2019-01-08 14:46:57,242 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:57,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:46:57,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 129 [2019-01-08 14:46:57,471 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:46:57,649 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 3 dim-1 vars, End of recursive call: 26 dim-0 vars, and 5 xjuncts. [2019-01-08 14:46:57,650 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 19 variables, input treesize:195, output treesize:273 [2019-01-08 14:46:57,893 WARN L181 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 135 [2019-01-08 14:46:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:57,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:46:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:46:58,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:46:58,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2019-01-08 14:46:58,053 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:46:58,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 14:46:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 14:46:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-01-08 14:46:58,055 INFO L87 Difference]: Start difference. First operand 5024 states and 40319 transitions. Second operand 14 states. [2019-01-08 14:46:58,376 WARN L181 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2019-01-08 14:46:58,735 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2019-01-08 14:46:59,218 WARN L181 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2019-01-08 14:46:59,468 WARN L181 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 121 [2019-01-08 14:47:00,590 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2019-01-08 14:47:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:47:08,386 INFO L93 Difference]: Finished difference Result 5594 states and 44332 transitions. [2019-01-08 14:47:08,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-01-08 14:47:08,386 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-08 14:47:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:47:08,406 INFO L225 Difference]: With dead ends: 5594 [2019-01-08 14:47:08,406 INFO L226 Difference]: Without dead ends: 5593 [2019-01-08 14:47:08,408 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2019-01-08 14:47:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2019-01-08 14:47:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 5044. [2019-01-08 14:47:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5044 states. [2019-01-08 14:47:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5044 states to 5044 states and 40479 transitions. [2019-01-08 14:47:14,833 INFO L78 Accepts]: Start accepts. Automaton has 5044 states and 40479 transitions. Word has length 7 [2019-01-08 14:47:14,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:47:14,834 INFO L480 AbstractCegarLoop]: Abstraction has 5044 states and 40479 transitions. [2019-01-08 14:47:14,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 14:47:14,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5044 states and 40479 transitions. [2019-01-08 14:47:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:47:14,841 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:47:14,841 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:47:14,842 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:47:14,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:47:14,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2016189126, now seen corresponding path program 2 times [2019-01-08 14:47:14,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:47:14,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:47:14,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:47:14,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:47:14,843 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:47:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:47:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:14,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:47:14,957 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:47:14,957 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-01-08 14:47:14,957 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-01-08 14:47:14,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:47:14,957 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:47:14,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-01-08 14:47:14,966 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-01-08 14:47:14,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-01-08 14:47:14,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-01-08 14:47:14,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:47:15,004 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 14:47:15,008 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 14:47:15,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,013 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 14:47:15,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,019 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 31 treesize of output 57 [2019-01-08 14:47:15,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:47:15,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,035 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,039 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:47:15,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,051 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 14:47:15,052 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,113 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,145 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,173 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,194 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,213 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,228 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:47:15,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:47:15,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:47:15,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,429 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,431 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,432 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:47:15,508 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,510 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,511 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,513 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:47:15,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,623 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:47:15,624 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,663 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,703 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,744 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,785 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,827 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:15,896 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:15,896 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:118, output treesize:120 [2019-01-08 14:47:15,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:15,960 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 14:47:15,960 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:16,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:16,025 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:130, output treesize:96 [2019-01-08 14:47:16,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,084 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 14:47:16,085 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:16,154 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:16,155 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:108, output treesize:78 [2019-01-08 14:47:16,196 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,197 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,209 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:16,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,211 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 151 [2019-01-08 14:47:16,211 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:16,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:16,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:64 [2019-01-08 14:47:16,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,336 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:16,337 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 50 treesize of output 154 [2019-01-08 14:47:16,338 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:16,407 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 14:47:16,408 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:78, output treesize:60 [2019-01-08 14:47:16,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,463 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:16,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:16,465 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 50 treesize of output 149 [2019-01-08 14:47:16,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:16,534 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 14:47:16,534 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:70, output treesize:58 [2019-01-08 14:47:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:16,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:47:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:16,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:47:16,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-08 14:47:16,681 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:47:16,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 14:47:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 14:47:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:47:16,682 INFO L87 Difference]: Start difference. First operand 5044 states and 40479 transitions. Second operand 14 states. [2019-01-08 14:47:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:47:24,712 INFO L93 Difference]: Finished difference Result 5331 states and 42307 transitions. [2019-01-08 14:47:24,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:47:24,712 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-08 14:47:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:47:24,733 INFO L225 Difference]: With dead ends: 5331 [2019-01-08 14:47:24,734 INFO L226 Difference]: Without dead ends: 5326 [2019-01-08 14:47:24,735 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-01-08 14:47:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2019-01-08 14:47:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 5064. [2019-01-08 14:47:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5064 states. [2019-01-08 14:47:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 40630 transitions. [2019-01-08 14:47:31,358 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 40630 transitions. Word has length 7 [2019-01-08 14:47:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:47:31,359 INFO L480 AbstractCegarLoop]: Abstraction has 5064 states and 40630 transitions. [2019-01-08 14:47:31,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 14:47:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 40630 transitions. [2019-01-08 14:47:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:47:31,367 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:47:31,367 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:47:31,367 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:47:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:47:31,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2016202580, now seen corresponding path program 1 times [2019-01-08 14:47:31,367 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:47:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:47:31,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-01-08 14:47:31,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:47:31,368 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:47:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:47:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:31,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:47:31,498 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:47:31,498 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:47:31,498 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [26], [31] [2019-01-08 14:47:31,499 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:47:31,499 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:47:31,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:47:31,924 INFO L272 AbstractInterpreter]: Visited 7 different actions 13 times. Merged at 1 different actions 1 times. Never widened. Found 10 fixpoints after 6 different actions. Largest state had 0 variables. [2019-01-08 14:47:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:47:31,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:47:31,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:47:31,924 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:47:31,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:47:31,933 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:47:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:47:31,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:47:31,963 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 14:47:31,965 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 14:47:31,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:31,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:31,970 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 14:47:32,007 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,015 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,016 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 14:47:32,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,024 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:47:32,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,034 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,036 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:47:32,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:47:32,046 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,088 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,122 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,145 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,166 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,183 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,198 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:47:32,270 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,272 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:47:32,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,319 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:47:32,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,376 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:47:32,440 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:47:32,450 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,474 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,501 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,526 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,553 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,603 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:32,603 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:95, output treesize:96 [2019-01-08 14:47:32,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:47:32,705 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:32,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:71 [2019-01-08 14:47:32,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,802 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:47:32,803 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,849 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:32,850 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:57 [2019-01-08 14:47:32,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,892 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,897 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:32,898 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2019-01-08 14:47:32,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:32,951 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:32,952 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:47 [2019-01-08 14:47:32,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:32,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,000 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:33,001 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-01-08 14:47:33,002 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:33,048 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:33,048 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:47 [2019-01-08 14:47:33,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,088 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,096 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,096 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:33,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:33,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2019-01-08 14:47:33,099 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:33,147 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 14:47:33,148 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:49 [2019-01-08 14:47:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:33,176 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:47:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:33,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:47:33,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2019-01-08 14:47:33,286 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:47:33,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-01-08 14:47:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-01-08 14:47:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2019-01-08 14:47:33,286 INFO L87 Difference]: Start difference. First operand 5064 states and 40630 transitions. Second operand 14 states. [2019-01-08 14:47:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:47:41,423 INFO L93 Difference]: Finished difference Result 5437 states and 43201 transitions. [2019-01-08 14:47:41,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-01-08 14:47:41,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2019-01-08 14:47:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:47:41,447 INFO L225 Difference]: With dead ends: 5437 [2019-01-08 14:47:41,448 INFO L226 Difference]: Without dead ends: 5435 [2019-01-08 14:47:41,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2019-01-08 14:47:41,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2019-01-08 14:47:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 5126. [2019-01-08 14:47:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5126 states. [2019-01-08 14:47:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 41123 transitions. [2019-01-08 14:47:48,274 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 41123 transitions. Word has length 7 [2019-01-08 14:47:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:47:48,274 INFO L480 AbstractCegarLoop]: Abstraction has 5126 states and 41123 transitions. [2019-01-08 14:47:48,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-01-08 14:47:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 41123 transitions. [2019-01-08 14:47:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:47:48,281 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:47:48,281 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:47:48,281 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:47:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:47:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2015708374, now seen corresponding path program 1 times [2019-01-08 14:47:48,281 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:47:48,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:47:48,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:47:48,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:47:48,282 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:47:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:47:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:48,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:47:48,330 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:47:48,330 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:47:48,330 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [32], [34], [35] [2019-01-08 14:47:48,331 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:47:48,331 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:47:48,650 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:47:48,651 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:47:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:47:48,651 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:47:48,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:47:48,651 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:47:48,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:47:48,659 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:47:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:47:48,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:47:48,688 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 14:47:48,692 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 14:47:48,698 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 29 treesize of output 35 [2019-01-08 14:47:48,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,708 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 14:47:48,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,719 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 14:47:48,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 14:47:48,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 88 [2019-01-08 14:47:48,748 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,782 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,812 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,832 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,847 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,863 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,880 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:48,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,912 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 57 treesize of output 63 [2019-01-08 14:47:48,915 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 59 treesize of output 48 [2019-01-08 14:47:48,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,939 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 41 treesize of output 62 [2019-01-08 14:47:48,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:48,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 72 [2019-01-08 14:47:49,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,049 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 53 [2019-01-08 14:47:49,057 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,079 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,101 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,126 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,149 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,191 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:49,192 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:84, output treesize:88 [2019-01-08 14:47:49,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 83 [2019-01-08 14:47:49,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,289 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:49,289 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:93, output treesize:63 [2019-01-08 14:47:49,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,335 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 97 [2019-01-08 14:47:49,336 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:47:49,378 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:75, output treesize:49 [2019-01-08 14:47:49,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,415 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:47:49,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:47:49,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 110 [2019-01-08 14:47:49,418 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:47:49,462 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 14:47:49,462 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:39 [2019-01-08 14:47:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:49,486 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:47:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:47:49,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:47:49,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:47:49,541 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:47:49,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:47:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:47:49,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:47:49,542 INFO L87 Difference]: Start difference. First operand 5126 states and 41123 transitions. Second operand 10 states. [2019-01-08 14:47:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:47:56,832 INFO L93 Difference]: Finished difference Result 5176 states and 41175 transitions. [2019-01-08 14:47:56,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:47:56,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:47:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:47:56,852 INFO L225 Difference]: With dead ends: 5176 [2019-01-08 14:47:56,852 INFO L226 Difference]: Without dead ends: 5175 [2019-01-08 14:47:56,854 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:47:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2019-01-08 14:48:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 5126. [2019-01-08 14:48:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5126 states. [2019-01-08 14:48:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5126 states to 5126 states and 41123 transitions. [2019-01-08 14:48:03,803 INFO L78 Accepts]: Start accepts. Automaton has 5126 states and 41123 transitions. Word has length 7 [2019-01-08 14:48:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:48:03,803 INFO L480 AbstractCegarLoop]: Abstraction has 5126 states and 41123 transitions. [2019-01-08 14:48:03,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:48:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5126 states and 41123 transitions. [2019-01-08 14:48:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:48:03,810 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:48:03,810 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:48:03,810 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:48:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2015712282, now seen corresponding path program 1 times [2019-01-08 14:48:03,810 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:48:03,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:03,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:03,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:03,811 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:48:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:03,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:03,898 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:48:03,898 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:48:03,898 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [26], [28], [32], [33] [2019-01-08 14:48:03,899 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:48:03,899 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:48:04,316 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:48:04,316 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:48:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:04,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:48:04,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:04,317 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:48:04,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:04,329 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:48:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:04,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:48:04,367 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 14:48:04,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 14:48:04,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,387 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 14:48:04,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,393 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:48:04,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 14:48:04,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,415 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 14:48:04,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,426 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 14:48:04,427 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,488 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,524 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,550 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,571 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,586 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,601 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:04,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,642 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:48:04,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:48:04,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:48:04,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,807 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,809 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:48:04,881 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,888 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:48:04,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:04,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:48:04,993 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,034 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,074 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,114 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,156 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,197 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,266 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:05,267 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:48:05,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:48:05,318 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,383 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:05,384 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:48:05,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,428 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,429 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 14:48:05,430 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,497 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:05,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:48:05,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,548 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:05,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,550 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 147 [2019-01-08 14:48:05,551 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,622 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 14:48:05,622 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:64 [2019-01-08 14:48:05,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,660 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,675 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:05,675 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:05,676 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 50 treesize of output 150 [2019-01-08 14:48:05,677 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:05,744 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 14:48:05,745 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:78, output treesize:60 [2019-01-08 14:48:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:05,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:48:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:05,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:48:05,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:48:05,857 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:48:05,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:48:05,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:48:05,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:48:05,858 INFO L87 Difference]: Start difference. First operand 5126 states and 41123 transitions. Second operand 12 states. [2019-01-08 14:48:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:48:15,554 INFO L93 Difference]: Finished difference Result 5220 states and 41403 transitions. [2019-01-08 14:48:15,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:48:15,555 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:48:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:48:15,577 INFO L225 Difference]: With dead ends: 5220 [2019-01-08 14:48:15,577 INFO L226 Difference]: Without dead ends: 5217 [2019-01-08 14:48:15,579 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:48:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2019-01-08 14:48:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5145. [2019-01-08 14:48:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5145 states. [2019-01-08 14:48:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5145 states to 5145 states and 41275 transitions. [2019-01-08 14:48:22,382 INFO L78 Accepts]: Start accepts. Automaton has 5145 states and 41275 transitions. Word has length 7 [2019-01-08 14:48:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:48:22,382 INFO L480 AbstractCegarLoop]: Abstraction has 5145 states and 41275 transitions. [2019-01-08 14:48:22,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:48:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5145 states and 41275 transitions. [2019-01-08 14:48:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:48:22,390 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:48:22,390 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:48:22,390 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:48:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:22,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2015725736, now seen corresponding path program 1 times [2019-01-08 14:48:22,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:48:22,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:22,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:22,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:22,392 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:48:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:22,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:22,457 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:48:22,457 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:48:22,457 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [26], [32], [33] [2019-01-08 14:48:22,457 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:48:22,458 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:48:22,865 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:48:22,865 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:48:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:22,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:48:22,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:22,866 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:48:22,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:22,874 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:48:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:22,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:48:22,907 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 14:48:22,910 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 14:48:22,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,916 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 14:48:22,920 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,922 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 14:48:22,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,929 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,931 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,932 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 14:48:22,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:22,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 97 [2019-01-08 14:48:22,952 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:48:22,952 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:22,994 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,026 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,050 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,071 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,089 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,104 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:48:23,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:48:23,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:48:23,280 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,281 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,283 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,284 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:48:23,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:48:23,359 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,386 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,413 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,440 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,466 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,516 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:23,516 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:95, output treesize:96 [2019-01-08 14:48:23,688 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-01-08 14:48:23,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:48:23,694 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,738 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:23,738 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2019-01-08 14:48:23,773 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,774 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,775 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2019-01-08 14:48:23,782 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,828 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:23,828 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2019-01-08 14:48:23,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,868 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:23,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2019-01-08 14:48:23,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:23,922 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:23,922 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2019-01-08 14:48:23,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:23,969 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:23,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2019-01-08 14:48:23,970 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:24,021 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 14:48:24,022 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2019-01-08 14:48:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:24,048 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:48:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:24,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:48:24,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:48:24,132 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:48:24,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:48:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:48:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:48:24,132 INFO L87 Difference]: Start difference. First operand 5145 states and 41275 transitions. Second operand 12 states. [2019-01-08 14:48:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:48:31,804 INFO L93 Difference]: Finished difference Result 5237 states and 41553 transitions. [2019-01-08 14:48:31,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:48:31,805 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:48:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:48:31,826 INFO L225 Difference]: With dead ends: 5237 [2019-01-08 14:48:31,826 INFO L226 Difference]: Without dead ends: 5236 [2019-01-08 14:48:31,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:48:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2019-01-08 14:48:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 5156. [2019-01-08 14:48:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5156 states. [2019-01-08 14:48:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 41363 transitions. [2019-01-08 14:48:38,698 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 41363 transitions. Word has length 7 [2019-01-08 14:48:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:48:38,698 INFO L480 AbstractCegarLoop]: Abstraction has 5156 states and 41363 transitions. [2019-01-08 14:48:38,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:48:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 41363 transitions. [2019-01-08 14:48:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:48:38,705 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:48:38,705 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:48:38,705 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:48:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2015666154, now seen corresponding path program 1 times [2019-01-08 14:48:38,705 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:48:38,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:38,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:38,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:38,706 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:48:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:38,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:38,858 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:48:38,858 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:48:38,858 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [32], [33] [2019-01-08 14:48:38,859 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:48:38,859 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:48:39,317 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:48:39,318 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:48:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:39,318 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:48:39,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:39,318 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:48:39,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:39,325 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:48:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:39,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:48:39,360 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 14:48:39,362 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 14:48:39,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,369 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 14:48:39,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 14:48:39,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,385 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 14:48:39,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,396 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 14:48:39,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,406 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,409 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 14:48:39,410 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,469 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,504 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,531 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,551 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,568 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,583 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:39,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-08 14:48:39,672 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-08 14:48:39,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-08 14:48:39,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,788 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-08 14:48:39,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,872 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-08 14:48:39,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:39,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-01-08 14:48:39,979 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,019 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,060 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,101 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,142 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,182 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,251 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:40,252 INFO L202 ElimStorePlain]: Needed 14 recursive calls to eliminate 4 variables, input treesize:118, output treesize:120 [2019-01-08 14:48:40,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,298 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 14:48:40,299 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,364 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:40,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:130, output treesize:96 [2019-01-08 14:48:40,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,411 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,412 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,414 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,416 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 14:48:40,417 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,484 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:40,485 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:108, output treesize:78 [2019-01-08 14:48:40,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,534 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:40,535 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 152 [2019-01-08 14:48:40,536 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,607 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 14:48:40,607 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:88, output treesize:66 [2019-01-08 14:48:40,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,651 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:40,660 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:40,661 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 152 [2019-01-08 14:48:40,661 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:40,733 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 14:48:40,733 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:76, output treesize:62 [2019-01-08 14:48:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:40,768 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:48:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:40,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:48:40,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:48:40,857 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:48:40,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:48:40,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:48:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:48:40,857 INFO L87 Difference]: Start difference. First operand 5156 states and 41363 transitions. Second operand 12 states. [2019-01-08 14:48:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:48:48,194 INFO L93 Difference]: Finished difference Result 5220 states and 41437 transitions. [2019-01-08 14:48:48,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-08 14:48:48,194 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2019-01-08 14:48:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:48:48,211 INFO L225 Difference]: With dead ends: 5220 [2019-01-08 14:48:48,211 INFO L226 Difference]: Without dead ends: 5219 [2019-01-08 14:48:48,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2019-01-08 14:48:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5219 states. [2019-01-08 14:48:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5219 to 5156. [2019-01-08 14:48:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5156 states. [2019-01-08 14:48:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 41363 transitions. [2019-01-08 14:48:55,052 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 41363 transitions. Word has length 7 [2019-01-08 14:48:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:48:55,052 INFO L480 AbstractCegarLoop]: Abstraction has 5156 states and 41363 transitions. [2019-01-08 14:48:55,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-01-08 14:48:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 41363 transitions. [2019-01-08 14:48:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:48:55,059 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:48:55,059 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:48:55,059 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:48:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2026790626, now seen corresponding path program 1 times [2019-01-08 14:48:55,059 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:48:55,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:55,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:55,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:48:55,060 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:48:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:55,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:55,139 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:48:55,139 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:48:55,139 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [26], [32], [34], [35] [2019-01-08 14:48:55,140 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:48:55,140 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:48:55,542 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:48:55,543 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-08 14:48:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:48:55,543 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:48:55,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:48:55,543 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:48:55,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:48:55,551 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:48:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:48:55,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:48:55,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:48:55,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:48:55,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,664 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:48:55,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,713 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,716 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:48:55,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,783 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,786 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:55,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:48:55,787 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:55,813 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:55,838 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:55,864 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:55,889 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:55,925 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 14:48:55,927 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2019-01-08 14:48:55,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 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 14:48:55,933 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2019-01-08 14:48:55,935 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 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 14:48:55,937 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 14:48:55,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:48:55,947 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:55,984 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,012 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,034 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,051 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,066 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,078 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,124 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:56,125 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:48:56,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,179 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2019-01-08 14:48:56,180 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,221 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:56,221 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2019-01-08 14:48:56,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,256 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:56,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2019-01-08 14:48:56,258 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,302 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-01-08 14:48:56,302 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2019-01-08 14:48:56,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,334 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:48:56,336 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:48:56,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2019-01-08 14:48:56,337 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:48:56,380 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 14:48:56,380 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2019-01-08 14:48:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:56,415 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:48:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:48:56,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:48:56,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-08 14:48:56,473 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:48:56,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-08 14:48:56,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-08 14:48:56,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2019-01-08 14:48:56,473 INFO L87 Difference]: Start difference. First operand 5156 states and 41363 transitions. Second operand 10 states. [2019-01-08 14:49:03,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-08 14:49:03,461 INFO L93 Difference]: Finished difference Result 5193 states and 41407 transitions. [2019-01-08 14:49:03,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-08 14:49:03,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-01-08 14:49:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-08 14:49:03,481 INFO L225 Difference]: With dead ends: 5193 [2019-01-08 14:49:03,481 INFO L226 Difference]: Without dead ends: 5192 [2019-01-08 14:49:03,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:49:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5192 states. [2019-01-08 14:49:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5192 to 5156. [2019-01-08 14:49:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5156 states. [2019-01-08 14:49:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 41363 transitions. [2019-01-08 14:49:10,259 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 41363 transitions. Word has length 7 [2019-01-08 14:49:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-08 14:49:10,259 INFO L480 AbstractCegarLoop]: Abstraction has 5156 states and 41363 transitions. [2019-01-08 14:49:10,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-08 14:49:10,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 41363 transitions. [2019-01-08 14:49:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-08 14:49:10,267 INFO L394 BasicCegarLoop]: Found error trace [2019-01-08 14:49:10,268 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-08 14:49:10,268 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-08 14:49:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:49:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2026740718, now seen corresponding path program 1 times [2019-01-08 14:49:10,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-08 14:49:10,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:49:10,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:49:10,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-08 14:49:10,269 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-08 14:49:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:49:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:49:10,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:49:10,309 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-08 14:49:10,309 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2019-01-08 14:49:10,309 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [28], [32], [33] [2019-01-08 14:49:10,309 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-08 14:49:10,309 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-08 14:49:10,676 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-08 14:49:10,676 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2019-01-08 14:49:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-08 14:49:10,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-08 14:49:10,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-08 14:49:10,677 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-08 14:49:10,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-08 14:49:10,685 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-08 14:49:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-08 14:49:10,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-08 14:49:10,715 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 14:49:10,718 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 14:49:10,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,723 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 14:49:10,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,731 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 14:49:10,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 75 [2019-01-08 14:49:10,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,748 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 14:49:10,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 96 [2019-01-08 14:49:10,758 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,797 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,829 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,852 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,872 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,888 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,903 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:10,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2019-01-08 14:49:10,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:10,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2019-01-08 14:49:11,017 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,018 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2019-01-08 14:49:11,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2019-01-08 14:49:11,135 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,138 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,141 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2019-01-08 14:49:11,143 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:11,168 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:11,192 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:11,217 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:11,242 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-08 14:49:11,289 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-01-08 14:49:11,289 INFO L202 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:95, output treesize:96 [2019-01-08 14:49:11,325 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 100 [2019-01-08 14:49:11,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-08 14:49:11,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2019-01-08 14:49:11,479 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:106, output treesize:150 [2019-01-08 14:49:11,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,546 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:49:11,547 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 83 treesize of output 120 [2019-01-08 14:49:11,547 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:11,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,654 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,655 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,656 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,657 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,658 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,667 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:49:11,676 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 88 treesize of output 119 [2019-01-08 14:49:11,677 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-01-08 14:49:11,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2019-01-08 14:49:11,852 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:172, output treesize:186 [2019-01-08 14:49:11,932 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,933 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,935 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:11,941 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:49:11,942 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 73 treesize of output 99 [2019-01-08 14:49:11,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:12,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,082 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,083 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,084 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,085 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:49:12,086 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 73 treesize of output 107 [2019-01-08 14:49:12,086 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:12,217 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,219 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:12,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 78 treesize of output 140 [2019-01-08 14:49:12,272 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 16 xjuncts. [2019-01-08 14:49:12,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 29 dim-0 vars, and 7 xjuncts. [2019-01-08 14:49:12,784 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:225, output treesize:419 [2019-01-08 14:49:23,193 WARN L181 SmtUtils]: Spent 10.36 s on a formula simplification. DAG size of input: 228 DAG size of output: 138 [2019-01-08 14:49:23,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,201 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,202 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,203 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,205 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,207 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,208 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,209 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 83 treesize of output 105 [2019-01-08 14:49:23,209 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:23,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,386 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,387 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,389 INFO L683 Elim1Store]: detected equality via solver [2019-01-08 14:49:23,390 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 61 treesize of output 127 [2019-01-08 14:49:23,390 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:23,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,563 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,565 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,567 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,568 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,570 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 83 treesize of output 129 [2019-01-08 14:49:23,570 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:23,717 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-08 14:49:23,736 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 61 treesize of output 135 [2019-01-08 14:49:23,736 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-01-08 14:49:23,863 INFO L267 ElimStorePlain]: Start of recursive call 1: 20 dim-0 vars, 4 dim-1 vars, End of recursive call: 20 dim-0 vars, and 4 xjuncts. [2019-01-08 14:49:23,863 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 24 variables, input treesize:289, output treesize:213 [2019-01-08 14:49:24,080 WARN L181 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-01-08 14:49:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:49:24,086 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-08 14:49:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-08 14:49:24,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-08 14:49:24,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2019-01-08 14:49:24,218 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-08 14:49:24,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-01-08 14:49:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-01-08 14:49:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2019-01-08 14:49:24,219 INFO L87 Difference]: Start difference. First operand 5156 states and 41363 transitions. Second operand 12 states. [2019-01-08 14:49:27,063 WARN L181 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 106 [2019-01-08 14:49:30,270 WARN L181 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 107