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-8-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f57a05f [2019-01-07 22:12:41,267 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-07 22:12:41,269 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-07 22:12:41,286 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-01-07 22:12:41,341 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 [2019-01-07 22:12:41,362 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-07 22:12:41,363 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-07 22:12:41,364 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-01-07 22:12:41,365 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-01-07 22:12:41,365 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-01-07 22:12:41,365 INFO L133 SettingsManager]: * User list type=DISABLED [2019-01-07 22:12:41,365 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-01-07 22:12:41,365 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-01-07 22:12:41,366 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-01-07 22:12:41,366 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-01-07 22:12:41,366 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-01-07 22:12:41,366 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-01-07 22:12:41,366 INFO L133 SettingsManager]: * Interval Domain=false [2019-01-07 22:12:41,367 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-07 22:12:41,368 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-07 22:12:41,368 INFO L133 SettingsManager]: * Use SBE=true [2019-01-07 22:12:41,368 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-07 22:12:41,368 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-07 22:12:41,368 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-07 22:12:41,369 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-07 22:12:41,369 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-07 22:12:41,369 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-07 22:12:41,369 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-07 22:12:41,369 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-07 22:12:41,370 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-07 22:12:41,371 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-07 22:12:41,372 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-07 22:12:41,372 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-07 22:12:41,372 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-07 22:12:41,372 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-07 22:12:41,372 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 22:12:41,373 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-07 22:12:41,373 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-07 22:12:41,373 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-07 22:12:41,373 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-01-07 22:12:41,374 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-07 22:12:41,374 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-07 22:12:41,374 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-01-07 22:12:41,374 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-01-07 22:12:41,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-07 22:12:41,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-07 22:12:41,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-07 22:12:41,452 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-01-07 22:12:41,453 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-01-07 22:12:41,453 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-01-07 22:12:41,454 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-01-07 22:12:41,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-07 22:12:41,507 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-01-07 22:12:41,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-07 22:12:41,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-07 22:12:41,509 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-07 22:12:41,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-07 22:12:41,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-07 22:12:41,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-07 22:12:41,578 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-07 22:12:41,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... [2019-01-07 22:12:41,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-07 22:12:41,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-07 22:12:41,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-07 22:12:41,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-07 22:12:41,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-07 22:12:41,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-07 22:12:41,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-07 22:12:42,174 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-07 22:12:42,175 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-01-07 22:12:42,176 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 10:12:42 BoogieIcfgContainer [2019-01-07 22:12:42,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-07 22:12:42,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-07 22:12:42,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-07 22:12:42,186 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-07 22:12:42,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.01 10:12:41" (1/2) ... [2019-01-07 22:12:42,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecacd74 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 10:12:42, skipping insertion in model container [2019-01-07 22:12:42,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 10:12:42" (2/2) ... [2019-01-07 22:12:42,190 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-01-07 22:12:42,201 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-07 22:12:42,213 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-01-07 22:12:42,232 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-01-07 22:12:42,271 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-07 22:12:42,271 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-07 22:12:42,272 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-07 22:12:42,272 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-07 22:12:42,272 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-07 22:12:42,272 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-07 22:12:42,272 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-07 22:12:42,272 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-07 22:12:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-01-07 22:12:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-01-07 22:12:42,295 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:12:42,296 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-01-07 22:12:42,299 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:12:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:12:42,305 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-01-07 22:12:42,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:12:42,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:12:42,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:12:42,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:12:42,357 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:12:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:12:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:12:42,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 22:12:42,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 22:12:42,549 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 22:12:42,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 22:12:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 22:12:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 22:12:42,572 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-01-07 22:12:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:12:42,808 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-01-07 22:12:42,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 22:12:42,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-01-07 22:12:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:12:42,825 INFO L225 Difference]: With dead ends: 37 [2019-01-07 22:12:42,825 INFO L226 Difference]: Without dead ends: 32 [2019-01-07 22:12:42,828 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 [2019-01-07 22:12:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-01-07 22:12:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-01-07 22:12:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-01-07 22:12:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-01-07 22:12:42,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-01-07 22:12:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:12:42,866 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-01-07 22:12:42,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 22:12:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-01-07 22:12:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 22:12:42,867 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:12:42,867 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 22:12:42,868 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:12:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:12:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-01-07 22:12:42,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:12:42,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:12:42,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:12:42,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:12:42,872 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:12:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:12:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:12:43,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:12:43,010 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:12:43,011 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 22:12:43,013 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-01-07 22:12:43,070 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:12:43,071 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:12:47,552 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:12:47,554 INFO L272 AbstractInterpreter]: Visited 3 different actions 11 times. Merged at 1 different actions 4 times. Widened at 1 different actions 1 times. Found 5 fixpoints after 2 different actions. Largest state had 0 variables. [2019-01-07 22:12:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:12:47,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:12:47,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:12:47,564 INFO 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 [2019-01-07 22:12:47,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:12:47,584 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:12:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:12:47,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:12:47,959 WARN L181 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 22:12:47,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:12:48,020 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:12:48,066 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,091 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 32 treesize of output 46 [2019-01-07 22:12:48,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:12:48,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:12:48,341 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,442 INFO L303 Elim1Store]: Index analysis took 144 ms [2019-01-07 22:12:48,444 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 38 treesize of output 100 [2019-01-07 22:12:48,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,561 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,570 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,582 INFO L303 Elim1Store]: Index analysis took 130 ms [2019-01-07 22:12:48,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:12:48,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,619 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:48,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:12:48,639 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,126 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,529 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,578 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,620 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,653 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,677 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,702 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:49,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:12:49,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:12:49,960 WARN L181 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2019-01-07 22:12:49,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,971 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:49,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:12:50,192 WARN L181 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-07 22:12:50,198 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,199 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,204 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,206 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:12:50,355 WARN L181 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-01-07 22:12:50,360 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,373 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:12:50,506 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 22:12:50,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,521 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:12:50,674 WARN L181 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:12:50,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,687 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,688 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,689 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,692 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:50,695 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:12:50,697 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:12:50,758 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:50,844 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:50,906 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:50,969 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:51,042 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:51,152 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:12:51,267 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. [2019-01-07 22:12:51,268 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-01-07 22:12:51,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:12:51,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:12:51,358 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:12:51,579 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:12:51,579 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-01-07 22:12:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:12:51,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:12:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:12:51,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:12:51,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:12:51,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:12:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:12:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:12:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:12:51,721 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-01-07 22:13:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:03,411 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-01-07 22:13:03,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:13:03,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 22:13:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:03,414 INFO L225 Difference]: With dead ends: 63 [2019-01-07 22:13:03,414 INFO L226 Difference]: Without dead ends: 60 [2019-01-07 22:13:03,416 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 [2019-01-07 22:13:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-07 22:13:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-01-07 22:13:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-01-07 22:13:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-01-07 22:13:03,423 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-01-07 22:13:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:03,423 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-01-07 22:13:03,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:13:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-01-07 22:13:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 22:13:03,424 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:03,424 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 22:13:03,424 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-01-07 22:13:03,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:03,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:03,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:03,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:03,426 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:03,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:03,538 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:03,538 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 22:13:03,538 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-01-07 22:13:03,540 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:03,540 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:03,880 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:03,880 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. [2019-01-07 22:13:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:03,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:03,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:03,881 INFO 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 [2019-01-07 22:13:03,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:03,901 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:03,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:04,093 WARN L181 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-07 22:13:04,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:04,119 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 30 treesize of output 36 [2019-01-07 22:13:04,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:04,228 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,279 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:04,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:04,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:04,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,393 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,420 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:04,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:13:04,451 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,512 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,569 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,603 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,631 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,656 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,675 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,693 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:04,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,782 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-07 22:13:04,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,835 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 [2019-01-07 22:13:04,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,887 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,891 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 [2019-01-07 22:13:04,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:04,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-07 22:13:05,032 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,033 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,037 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,038 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,039 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,040 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,041 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,043 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:13:05,160 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,171 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 [2019-01-07 22:13:05,172 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,211 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,255 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,318 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,371 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,424 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,514 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. [2019-01-07 22:13:05,514 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 22:13:05,616 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:05,618 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-07 22:13:05,619 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:05,713 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. [2019-01-07 22:13:05,713 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 22:13:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:05,767 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:05,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:05,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:13:05,798 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:05,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:13:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:13:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:13:05,800 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-01-07 22:13:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:06,725 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-01-07 22:13:06,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:13:06,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 22:13:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:06,728 INFO L225 Difference]: With dead ends: 62 [2019-01-07 22:13:06,728 INFO L226 Difference]: Without dead ends: 60 [2019-01-07 22:13:06,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 22:13:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-01-07 22:13:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-01-07 22:13:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-07 22:13:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-01-07 22:13:06,736 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-01-07 22:13:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:06,736 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-01-07 22:13:06,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:13:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-01-07 22:13:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 22:13:06,736 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:06,737 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 22:13:06,737 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-01-07 22:13:06,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:06,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:06,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:06,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:06,738 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:06,798 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-07 22:13:06,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-01-07 22:13:06,798 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 22:13:06,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-07 22:13:06,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-07 22:13:06,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-07 22:13:06,799 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-01-07 22:13:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:06,874 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-01-07 22:13:06,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 22:13:06,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-01-07 22:13:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:06,876 INFO L225 Difference]: With dead ends: 31 [2019-01-07 22:13:06,876 INFO L226 Difference]: Without dead ends: 30 [2019-01-07 22:13:06,876 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 [2019-01-07 22:13:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-01-07 22:13:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-01-07 22:13:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-07 22:13:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-01-07 22:13:06,883 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-01-07 22:13:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:06,883 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-01-07 22:13:06,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-07 22:13:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-01-07 22:13:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 22:13:06,884 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:06,884 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 22:13:06,884 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:06,884 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-01-07 22:13:06,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:06,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:06,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:06,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:06,886 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:07,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:07,014 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:07,014 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 22:13:07,014 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-01-07 22:13:07,016 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:07,016 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:07,432 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:07,432 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. [2019-01-07 22:13:07,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:07,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:07,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:07,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 22:13:07,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:07,449 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:07,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:07,708 WARN L181 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-07 22:13:07,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:07,749 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:13:08,188 WARN L181 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-01-07 22:13:08,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,196 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 [2019-01-07 22:13:08,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,268 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 [2019-01-07 22:13:08,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:08,379 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 [2019-01-07 22:13:09,053 WARN L181 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-07 22:13:09,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,073 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,079 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:13:09,210 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,252 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:09,254 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 [2019-01-07 22:13:09,255 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,326 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,366 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,438 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,508 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,551 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,608 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:09,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:09,617 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:09,622 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:09,626 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:09,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:09,664 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:09,851 INFO L303 Elim1Store]: Index analysis took 184 ms [2019-01-07 22:13:09,852 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:13:09,854 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,924 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,966 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:09,998 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:10,023 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:10,120 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:10,136 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:10,153 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:10,222 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:13:10,223 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-01-07 22:13:10,272 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:10,273 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 [2019-01-07 22:13:10,274 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:10,340 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. [2019-01-07 22:13:10,341 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 22:13:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:10,367 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:10,396 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 22:13:10,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-07 22:13:10,397 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 22:13:10,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 22:13:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 22:13:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-07 22:13:10,398 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-01-07 22:13:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:10,502 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-01-07 22:13:10,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-07 22:13:10,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-01-07 22:13:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:10,504 INFO L225 Difference]: With dead ends: 32 [2019-01-07 22:13:10,504 INFO L226 Difference]: Without dead ends: 31 [2019-01-07 22:13:10,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-01-07 22:13:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-01-07 22:13:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-01-07 22:13:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-01-07 22:13:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-01-07 22:13:10,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-01-07 22:13:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:10,513 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-01-07 22:13:10,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 22:13:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-01-07 22:13:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 22:13:10,513 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:10,514 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 22:13:10,514 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-01-07 22:13:10,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:10,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:10,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:10,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:10,516 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:10,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:10,684 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:10,684 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 22:13:10,684 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-01-07 22:13:10,685 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:10,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:11,008 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:11,008 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. [2019-01-07 22:13:11,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:11,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:11,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:11,009 INFO 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) [2019-01-07 22:13:11,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:11,023 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-07 22:13:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:11,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:11,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:11,091 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:11,095 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,098 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:11,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,109 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,112 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:11,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:11,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,136 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,137 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,139 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:11,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,171 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,173 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,178 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:11,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:13:11,207 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,267 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,316 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,354 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,385 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,410 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,431 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,451 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:13:11,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 22:13:11,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,601 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,602 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 [2019-01-07 22:13:11,661 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,662 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,663 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,665 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,668 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 [2019-01-07 22:13:11,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,776 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,777 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,778 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:13:11,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,891 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,893 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,895 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,897 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,900 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:11,901 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 [2019-01-07 22:13:11,902 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,940 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:11,982 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:12,024 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:12,067 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:12,109 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:12,185 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. [2019-01-07 22:13:12,185 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 22:13:12,265 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:12,266 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 [2019-01-07 22:13:12,267 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:12,354 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-01-07 22:13:12,355 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 22:13:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:12,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:12,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:12,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:13:12,421 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:12,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:13:12,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:13:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:13:12,423 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-01-07 22:13:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:13,326 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-01-07 22:13:13,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:13:13,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 22:13:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:13,328 INFO L225 Difference]: With dead ends: 65 [2019-01-07 22:13:13,328 INFO L226 Difference]: Without dead ends: 64 [2019-01-07 22:13:13,329 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 22:13:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-01-07 22:13:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-01-07 22:13:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-01-07 22:13:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-01-07 22:13:13,338 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-01-07 22:13:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:13,338 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-01-07 22:13:13,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:13:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-01-07 22:13:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-01-07 22:13:13,339 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:13,339 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-01-07 22:13:13,340 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:13,340 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-01-07 22:13:13,340 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:13,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:13,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:13,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:13,341 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:13,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:13,434 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:13,434 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-01-07 22:13:13,435 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-01-07 22:13:13,436 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:13,436 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:13,725 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:13,725 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. [2019-01-07 22:13:13,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:13,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:13,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:13,726 INFO 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 [2019-01-07 22:13:13,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:13,735 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:13,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:13,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:13,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:13,830 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:13,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:13,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:13,890 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:13,911 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:13,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:13,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:13,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:14,042 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,044 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,048 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,051 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:14,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:14,075 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:13:14,076 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,138 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,185 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,223 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,252 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,277 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,297 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,316 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-07 22:13:14,413 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,415 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,416 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 [2019-01-07 22:13:14,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,468 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 [2019-01-07 22:13:14,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-01-07 22:13:14,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,620 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,625 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,626 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:13:14,730 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-07 22:13:14,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:14,745 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 [2019-01-07 22:13:14,746 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,786 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,839 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,879 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,921 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:14,964 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:15,040 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. [2019-01-07 22:13:15,040 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 22:13:15,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:15,129 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 [2019-01-07 22:13:15,130 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:15,208 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. [2019-01-07 22:13:15,209 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 22:13:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:15,227 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:15,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:15,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:13:15,290 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:15,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:13:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:13:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:13:15,291 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-01-07 22:13:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:16,075 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-01-07 22:13:16,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:13:16,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-01-07 22:13:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:16,076 INFO L225 Difference]: With dead ends: 67 [2019-01-07 22:13:16,077 INFO L226 Difference]: Without dead ends: 65 [2019-01-07 22:13:16,077 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-01-07 22:13:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-01-07 22:13:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-01-07 22:13:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-01-07 22:13:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-01-07 22:13:16,087 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-01-07 22:13:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:16,088 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-01-07 22:13:16,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:13:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-01-07 22:13:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:13:16,088 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:16,089 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:13:16,089 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:16,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:16,089 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-01-07 22:13:16,089 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:16,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:16,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:16,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:16,090 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:16,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:16,184 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:16,184 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:13:16,184 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-01-07 22:13:16,186 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:16,187 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:17,171 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:17,171 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 22:13:17,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:17,172 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:17,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:17,172 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 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 [2019-01-07 22:13:17,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:17,188 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:17,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:17,349 WARN L181 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 22:13:17,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:17,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:17,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,368 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:17,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:17,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:17,400 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,403 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,404 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,406 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:17,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,492 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:17,499 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,500 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,501 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,503 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,505 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:17,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:13:17,509 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,768 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,858 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,897 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,928 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,954 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,973 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:17,993 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:18,046 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:13:18,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:13:18,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:13:18,361 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-01-07 22:13:18,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,368 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:13:18,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,465 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:13:18,575 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 22:13:18,610 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,622 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,652 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:13:18,786 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:13:18,792 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,793 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,795 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,797 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,798 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,799 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,800 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,804 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:18,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:13:18,808 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:18,865 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:18,924 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:18,983 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:19,042 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:19,100 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:19,167 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:19,273 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. [2019-01-07 22:13:19,273 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 22:13:19,416 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:13:19,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:19,532 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. [2019-01-07 22:13:19,533 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 22:13:19,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:19,728 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:13:19,730 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 22:13:19,731 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:19,900 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:13:19,900 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-07 22:13:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:19,961 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:20,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:20,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:13:20,038 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:20,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:13:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:13:20,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:13:20,039 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-01-07 22:13:24,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:24,461 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-01-07 22:13:24,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:13:24,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:13:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:24,463 INFO L225 Difference]: With dead ends: 82 [2019-01-07 22:13:24,463 INFO L226 Difference]: Without dead ends: 80 [2019-01-07 22:13:24,464 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:13:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-07 22:13:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-01-07 22:13:24,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-01-07 22:13:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-01-07 22:13:24,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-01-07 22:13:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:24,475 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-01-07 22:13:24,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:13:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-01-07 22:13:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:13:24,476 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:24,476 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:13:24,476 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-01-07 22:13:24,477 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:24,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:24,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:24,478 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:24,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:24,559 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:24,560 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:13:24,560 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-01-07 22:13:24,561 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:24,562 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:26,398 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:26,399 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. [2019-01-07 22:13:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:26,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:26,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:26,400 INFO 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 [2019-01-07 22:13:26,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:26,410 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:26,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:26,434 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 22:13:26,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 22:13:26,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,566 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 22:13:26,687 WARN L181 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2019-01-07 22:13:26,694 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 22:13:26,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,785 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,789 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,794 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,796 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,804 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 22:13:26,894 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,896 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,901 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,903 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,914 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:26,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 22:13:26,916 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:26,970 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,028 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,086 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,145 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,205 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:27,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 22:13:27,382 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 22:13:27,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 22:13:27,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 22:13:27,424 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 22:13:27,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 22:13:27,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 22:13:27,445 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,497 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,536 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,568 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,591 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,610 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,625 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,642 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:27,712 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. [2019-01-07 22:13:27,713 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 22:13:28,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:28,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 149 [2019-01-07 22:13:28,460 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-07 22:13:28,514 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-07 22:13:30,392 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 54 dim-0 vars, and 9 xjuncts. [2019-01-07 22:13:30,393 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:873 [2019-01-07 22:13:42,399 WARN L181 SmtUtils]: Spent 9.74 s on a formula simplification. DAG size of input: 478 DAG size of output: 101 [2019-01-07 22:13:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:42,406 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:42,450 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-01-07 22:13:42,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-01-07 22:13:42,450 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-01-07 22:13:42,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-07 22:13:42,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-07 22:13:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-07 22:13:42,451 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-01-07 22:13:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:42,524 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-01-07 22:13:42,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-07 22:13:42,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-01-07 22:13:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:42,525 INFO L225 Difference]: With dead ends: 40 [2019-01-07 22:13:42,525 INFO L226 Difference]: Without dead ends: 39 [2019-01-07 22:13:42,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2019-01-07 22:13:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-01-07 22:13:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-01-07 22:13:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-01-07 22:13:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-01-07 22:13:42,535 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-01-07 22:13:42,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:42,535 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-01-07 22:13:42,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-07 22:13:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-01-07 22:13:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:13:42,536 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:42,536 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:13:42,546 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:42,547 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-01-07 22:13:42,547 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:42,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:42,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:42,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:42,548 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:42,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:42,662 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:42,662 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:13:42,662 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-01-07 22:13:42,663 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:42,663 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:43,338 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:43,338 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 22:13:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:43,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:43,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:43,339 INFO 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 [2019-01-07 22:13:43,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:43,348 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:43,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:43,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:13:43,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:13:43,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:13:43,612 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,621 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,624 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,627 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:13:43,715 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,718 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:13:43,838 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 22:13:43,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,856 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:13:43,991 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:13:43,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:43,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,003 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,006 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,008 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,010 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,011 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,012 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,014 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,016 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:13:44,018 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,084 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,149 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,224 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,298 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,365 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,442 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:44,538 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:44,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:44,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:44,549 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:44,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:44,559 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:44,565 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:13:44,566 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,638 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,682 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,714 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,741 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,762 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,779 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,796 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:44,895 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. [2019-01-07 22:13:44,896 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 22:13:44,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:44,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:13:44,942 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:45,038 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. [2019-01-07 22:13:45,039 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 22:13:45,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:45,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-07 22:13:45,081 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:45,205 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:13:45,206 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-07 22:13:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:45,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:45,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:45,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:13:45,341 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:45,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:13:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:13:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:13:45,342 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-01-07 22:13:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:49,278 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-01-07 22:13:49,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:13:49,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:13:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:49,280 INFO L225 Difference]: With dead ends: 84 [2019-01-07 22:13:49,280 INFO L226 Difference]: Without dead ends: 82 [2019-01-07 22:13:49,281 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:13:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-01-07 22:13:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-01-07 22:13:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-07 22:13:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-07 22:13:49,291 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-07 22:13:49,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:49,292 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-07 22:13:49,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:13:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-07 22:13:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:13:49,292 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:49,293 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:13:49,293 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:49,293 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-01-07 22:13:49,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:49,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:49,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:49,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:49,294 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:49,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:49,392 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:49,392 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:13:49,392 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-01-07 22:13:49,393 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:49,393 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:50,031 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:50,031 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 22:13:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:50,032 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:50,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:50,032 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 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 [2019-01-07 22:13:50,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:50,041 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:50,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:50,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:13:50,234 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,235 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,236 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:13:50,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,301 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:13:50,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,373 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,374 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,378 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:13:50,461 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,463 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,470 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:13:50,572 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,578 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,580 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:13:50,716 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:13:50,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:50,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:13:50,735 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:50,791 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:50,851 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:50,912 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:50,973 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,038 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,101 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:51,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:51,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:51,191 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:51,201 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:51,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:51,209 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:51,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:13:51,215 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,291 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,335 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,385 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,417 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,440 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,463 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,476 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,571 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. [2019-01-07 22:13:51,571 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 22:13:51,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,612 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:13:51,612 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,710 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. [2019-01-07 22:13:51,710 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 22:13:51,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,742 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,748 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,749 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,750 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:51,750 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:13:51,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-07 22:13:51,753 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:51,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:13:51,849 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-07 22:13:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:51,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:51,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:51,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:13:51,920 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:51,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:13:51,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:13:51,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:13:51,921 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-07 22:13:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:13:56,082 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-07 22:13:56,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:13:56,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:13:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:13:56,084 INFO L225 Difference]: With dead ends: 81 [2019-01-07 22:13:56,084 INFO L226 Difference]: Without dead ends: 80 [2019-01-07 22:13:56,085 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 [2019-01-07 22:13:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-01-07 22:13:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-01-07 22:13:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-01-07 22:13:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-01-07 22:13:56,095 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-01-07 22:13:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:13:56,095 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-01-07 22:13:56,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:13:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-01-07 22:13:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:13:56,096 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:13:56,096 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:13:56,097 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:13:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-01-07 22:13:56,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:13:56,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:56,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:56,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:13:56,098 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:13:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:56,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:56,251 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:13:56,251 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:13:56,251 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-01-07 22:13:56,252 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:13:56,252 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:13:56,851 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:13:56,851 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 22:13:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:13:56,852 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:13:56,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:13:56,852 INFO 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 [2019-01-07 22:13:56,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:13:56,862 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:13:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:13:56,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:13:57,088 WARN L181 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 22:13:57,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,094 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:13:57,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,151 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,151 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:13:57,213 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,216 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,218 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:13:57,290 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,298 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,304 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:13:57,391 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,399 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,402 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,405 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,408 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:13:57,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:13:57,660 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:13:57,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,667 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,671 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,673 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,674 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,676 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:57,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:13:57,687 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:57,772 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:57,841 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:57,911 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:57,990 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,067 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,143 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,235 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:13:58,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:13:58,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:13:58,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:13:58,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:13:58,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:13:58,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:13:58,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:13:58,265 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,349 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,400 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,438 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,466 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,489 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,509 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,527 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,648 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. [2019-01-07 22:13:58,648 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 22:13:58,680 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:13:58,683 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,799 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. [2019-01-07 22:13:58,799 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 22:13:58,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:13:58,843 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:13:58,844 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 174 [2019-01-07 22:13:58,846 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:13:58,944 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:13:58,945 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-01-07 22:13:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:59,089 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:13:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:13:59,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:13:59,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:13:59,133 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:13:59,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:13:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:13:59,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:13:59,134 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-01-07 22:14:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:00,541 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-01-07 22:14:00,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:00,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:00,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:00,543 INFO L225 Difference]: With dead ends: 81 [2019-01-07 22:14:00,543 INFO L226 Difference]: Without dead ends: 79 [2019-01-07 22:14:00,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:14:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-01-07 22:14:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-01-07 22:14:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-01-07 22:14:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-01-07 22:14:00,555 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-01-07 22:14:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:00,555 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-01-07 22:14:00,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-01-07 22:14:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:00,556 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:00,556 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:00,556 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-01-07 22:14:00,557 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:00,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:00,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:00,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:00,558 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:00,762 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2019-01-07 22:14:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:00,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:00,802 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:00,802 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:00,802 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-01-07 22:14:00,804 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:00,804 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:01,507 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:01,507 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 22:14:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:01,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:01,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:01,508 INFO 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 [2019-01-07 22:14:01,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:01,521 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:01,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:01,804 WARN L181 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 22:14:01,818 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:01,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:01,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:01,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:01,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,980 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:01,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:01,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:01,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,004 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,005 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:02,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,072 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:02,192 INFO L303 Elim1Store]: Index analysis took 182 ms [2019-01-07 22:14:02,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:14:02,194 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,808 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,857 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,894 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,925 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,950 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,970 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:02,991 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,045 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:14:03,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,105 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:14:03,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:14:03,236 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,237 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:14:03,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,328 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,331 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,332 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,333 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,337 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:14:03,441 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 22:14:03,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,456 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:14:03,587 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:14:03,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,597 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,600 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,603 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,604 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:03,605 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:14:03,606 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,664 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,723 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,782 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,843 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,905 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:03,968 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:04,066 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. [2019-01-07 22:14:04,067 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-01-07 22:14:04,105 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:14:04,106 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:04,203 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. [2019-01-07 22:14:04,203 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-01-07 22:14:04,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,339 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:04,442 INFO L303 Elim1Store]: Index analysis took 210 ms [2019-01-07 22:14:04,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 175 [2019-01-07 22:14:04,444 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:04,545 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:14:04,546 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-01-07 22:14:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:04,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:04,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:04,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 22:14:04,676 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:04,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:04,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 22:14:04,677 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-01-07 22:14:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:08,303 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-01-07 22:14:08,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 22:14:08,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:08,305 INFO L225 Difference]: With dead ends: 99 [2019-01-07 22:14:08,306 INFO L226 Difference]: Without dead ends: 95 [2019-01-07 22:14:08,306 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 22:14:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-01-07 22:14:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-01-07 22:14:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-07 22:14:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-01-07 22:14:08,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-01-07 22:14:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:08,317 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-01-07 22:14:08,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-01-07 22:14:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:08,318 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:08,318 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:08,319 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-01-07 22:14:08,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:08,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:08,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:08,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:08,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:08,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:08,422 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:08,422 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:08,422 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-01-07 22:14:08,423 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:08,423 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:08,744 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:08,744 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. [2019-01-07 22:14:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:08,745 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:08,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:08,745 INFO 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 [2019-01-07 22:14:08,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:08,763 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:08,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:08,916 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-07 22:14:08,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:08,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:08,928 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,930 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:08,934 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,936 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,938 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:08,941 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:08,951 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:08,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,963 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,965 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,967 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:08,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:08,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:08,984 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,043 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,089 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,128 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,158 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,211 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,229 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,247 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,293 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,294 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:09,342 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,344 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 [2019-01-07 22:14:09,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,394 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,395 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,396 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,397 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 [2019-01-07 22:14:09,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,459 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,461 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 [2019-01-07 22:14:09,533 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:14:09,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,639 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,640 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,642 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,648 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 [2019-01-07 22:14:09,649 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,688 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,728 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,773 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,813 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,855 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:09,928 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. [2019-01-07 22:14:09,928 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:09,976 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:09,977 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 [2019-01-07 22:14:09,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:10,043 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. [2019-01-07 22:14:10,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:10,074 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,075 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,076 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,077 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,078 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,079 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,080 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,081 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:10,083 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 [2019-01-07 22:14:10,084 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:10,153 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. [2019-01-07 22:14:10,154 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-07 22:14:10,375 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-01-07 22:14:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:10,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:10,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:10,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:14:10,823 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:10,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:10,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:14:10,824 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-01-07 22:14:11,338 WARN L181 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-07 22:14:12,352 WARN L181 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-01-07 22:14:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:13,736 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-01-07 22:14:13,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:13,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:13,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:13,738 INFO L225 Difference]: With dead ends: 101 [2019-01-07 22:14:13,739 INFO L226 Difference]: Without dead ends: 99 [2019-01-07 22:14:13,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:14:13,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-07 22:14:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-01-07 22:14:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-01-07 22:14:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-01-07 22:14:13,754 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-01-07 22:14:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:13,755 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-01-07 22:14:13,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-01-07 22:14:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:13,755 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:13,756 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:13,756 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-01-07 22:14:13,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:13,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:13,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:13,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:13,757 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:13,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:13,837 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:13,837 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:13,837 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-01-07 22:14:13,839 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:13,839 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:14,302 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:14,302 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. [2019-01-07 22:14:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:14,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:14,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:14,303 INFO 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 [2019-01-07 22:14:14,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:14,312 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:14,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:14,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:14,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,409 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,409 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 22:14:14,462 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,466 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-07 22:14:14,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,534 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 [2019-01-07 22:14:14,629 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,632 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,634 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,636 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,637 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,638 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:14:14,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,741 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,745 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,746 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,747 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:14,748 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 [2019-01-07 22:14:14,749 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:14,791 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:14,833 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:14,877 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:14,920 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:14,965 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:15,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:15,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:15,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:15,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:15,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:15,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:15,076 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:15,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:15,144 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:15,199 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:15,242 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:15,276 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:15,599 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:15,883 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:16,009 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:16,024 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:16,097 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. [2019-01-07 22:14:16,097 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:16,147 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 120 [2019-01-07 22:14:16,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:16,211 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. [2019-01-07 22:14:16,211 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:16,242 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,244 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:16,249 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:14:16,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 135 [2019-01-07 22:14:16,250 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:16,318 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. [2019-01-07 22:14:16,319 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-07 22:14:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:16,348 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:16,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:16,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:14:16,391 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:16,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:16,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:14:16,391 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-01-07 22:14:16,744 WARN L181 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-01-07 22:14:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:17,354 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-01-07 22:14:17,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:17,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:17,356 INFO L225 Difference]: With dead ends: 99 [2019-01-07 22:14:17,356 INFO L226 Difference]: Without dead ends: 98 [2019-01-07 22:14:17,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:14:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-01-07 22:14:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-01-07 22:14:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-01-07 22:14:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-01-07 22:14:17,372 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-01-07 22:14:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:17,372 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-01-07 22:14:17,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-01-07 22:14:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:17,373 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:17,373 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:17,373 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:17,374 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-01-07 22:14:17,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:17,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:17,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:17,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:17,375 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:17,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:17,441 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:17,442 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:17,442 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-01-07 22:14:17,444 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:17,444 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:17,743 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:17,743 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. [2019-01-07 22:14:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:17,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:17,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:17,744 INFO 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 [2019-01-07 22:14:17,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:17,752 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:17,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:17,808 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:17,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:17,816 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,820 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:17,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:17,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:17,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,853 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:17,858 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,868 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:17,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:17,885 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:17,886 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:17,970 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,018 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,056 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,084 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,109 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,128 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,168 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,211 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:18,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,258 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,259 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 [2019-01-07 22:14:18,306 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,307 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,308 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,309 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,310 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 [2019-01-07 22:14:18,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,370 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-07 22:14:18,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,445 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,447 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,448 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,449 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,450 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,452 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 22:14:18,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,547 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,549 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,553 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 [2019-01-07 22:14:18,554 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,629 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,666 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,703 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,740 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,781 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,851 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. [2019-01-07 22:14:18,851 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:18,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-07 22:14:18,900 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:18,963 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-01-07 22:14:18,963 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:18,994 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,996 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,997 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:18,999 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:19,000 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:14:19,001 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 [2019-01-07 22:14:19,002 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:19,068 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. [2019-01-07 22:14:19,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-01-07 22:14:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:19,274 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:19,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:19,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:14:19,684 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:19,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:19,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:14:19,685 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-01-07 22:14:20,214 WARN L181 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-07 22:14:21,162 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-01-07 22:14:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:21,535 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-01-07 22:14:21,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:21,535 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:21,537 INFO L225 Difference]: With dead ends: 101 [2019-01-07 22:14:21,537 INFO L226 Difference]: Without dead ends: 99 [2019-01-07 22:14:21,537 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:14:21,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-07 22:14:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-01-07 22:14:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-01-07 22:14:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-01-07 22:14:21,554 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-01-07 22:14:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:21,554 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-01-07 22:14:21,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-01-07 22:14:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:21,555 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:21,555 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:21,555 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-01-07 22:14:21,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:21,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:21,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:21,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:21,557 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:21,909 WARN L181 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 14 [2019-01-07 22:14:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:22,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:22,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:22,124 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:22,124 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-01-07 22:14:22,125 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:22,125 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:22,499 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:22,499 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. [2019-01-07 22:14:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:22,500 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:22,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:22,500 INFO 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 [2019-01-07 22:14:22,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:22,509 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:22,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:22,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,583 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 91 treesize of output 91 [2019-01-07 22:14:22,631 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,633 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,633 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 78 treesize of output 84 [2019-01-07 22:14:22,684 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,685 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,686 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,687 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 [2019-01-07 22:14:22,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,753 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,758 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 [2019-01-07 22:14:22,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:14:22,965 WARN L181 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-07 22:14:22,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,969 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,974 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:22,980 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 [2019-01-07 22:14:22,981 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,022 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,065 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,109 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,153 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,196 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:23,255 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:23,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:23,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:23,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:23,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:23,286 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:23,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:23,314 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,370 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,414 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,445 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,472 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,492 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,511 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,527 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,600 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. [2019-01-07 22:14:23,600 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:23,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-07 22:14:23,655 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,722 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. [2019-01-07 22:14:23,723 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:23,751 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,752 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,754 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,755 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,756 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,758 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:23,761 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 [2019-01-07 22:14:23,762 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:23,833 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. [2019-01-07 22:14:23,834 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-07 22:14:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:23,857 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:24,190 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:24,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:14:24,190 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:24,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:14:24,191 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-01-07 22:14:24,771 WARN L181 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2019-01-07 22:14:25,388 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2019-01-07 22:14:26,520 WARN L181 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-01-07 22:14:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:27,794 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-01-07 22:14:27,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:27,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:27,796 INFO L225 Difference]: With dead ends: 106 [2019-01-07 22:14:27,797 INFO L226 Difference]: Without dead ends: 104 [2019-01-07 22:14:27,797 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-01-07 22:14:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-01-07 22:14:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-01-07 22:14:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-01-07 22:14:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-01-07 22:14:27,811 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-01-07 22:14:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:27,811 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-01-07 22:14:27,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-01-07 22:14:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:27,812 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:27,812 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:27,812 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:27,813 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-01-07 22:14:27,813 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:27,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:27,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:27,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:27,814 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:27,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:27,964 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:27,965 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:27,965 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-01-07 22:14:27,968 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:27,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:28,243 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:28,243 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. [2019-01-07 22:14:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:28,244 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:28,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:28,244 INFO 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 [2019-01-07 22:14:28,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:28,254 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:28,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:28,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:28,312 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:28,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,320 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:28,327 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,329 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,330 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,331 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:28,335 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,337 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:28,343 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:28,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,355 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:28,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:28,372 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,429 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,478 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,517 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,547 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,572 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,592 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,609 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:28,659 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,660 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:28,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,727 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 78 treesize of output 84 [2019-01-07 22:14:28,779 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,780 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,781 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,782 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,783 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 [2019-01-07 22:14:28,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-07 22:14:28,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:28,953 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 22:14:29,050 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,051 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,052 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,054 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,055 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,056 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,057 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,058 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,059 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,060 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 [2019-01-07 22:14:29,061 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,102 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,142 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,184 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,225 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,265 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,338 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. [2019-01-07 22:14:29,339 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:29,385 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,386 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 [2019-01-07 22:14:29,387 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,453 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. [2019-01-07 22:14:29,453 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:29,509 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,515 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,517 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:29,521 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 [2019-01-07 22:14:29,522 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:29,594 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. [2019-01-07 22:14:29,594 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-01-07 22:14:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:29,645 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:29,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:29,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:14:29,688 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:29,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:29,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:29,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:14:29,688 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-01-07 22:14:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:30,402 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-01-07 22:14:30,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:30,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:30,405 INFO L225 Difference]: With dead ends: 107 [2019-01-07 22:14:30,405 INFO L226 Difference]: Without dead ends: 99 [2019-01-07 22:14:30,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:14:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-01-07 22:14:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-01-07 22:14:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-01-07 22:14:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-01-07 22:14:30,420 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-01-07 22:14:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:30,420 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-01-07 22:14:30,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-01-07 22:14:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:30,421 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:30,421 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:30,421 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-01-07 22:14:30,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:30,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:30,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:30,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:30,423 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:30,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:30,507 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:30,507 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:30,507 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-01-07 22:14:30,508 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:30,508 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:31,462 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:31,463 INFO L272 AbstractInterpreter]: Visited 4 different actions 10 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2019-01-07 22:14:31,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:31,463 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:31,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:31,463 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-01-07 22:14:31,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:31,480 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:31,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:31,728 WARN L181 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-01-07 22:14:31,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:31,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,825 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 [2019-01-07 22:14:31,874 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,875 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,876 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,877 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,878 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 [2019-01-07 22:14:31,937 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,938 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,939 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,940 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,942 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,943 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:31,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-07 22:14:32,019 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,020 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,021 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,022 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,028 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 [2019-01-07 22:14:32,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,124 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,126 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,128 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,132 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,134 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 [2019-01-07 22:14:32,134 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,176 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,219 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,261 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,303 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,345 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:32,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:32,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:32,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:32,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:32,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:32,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:32,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:32,436 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,517 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,611 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,720 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,746 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,768 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,786 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,800 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:32,872 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. [2019-01-07 22:14:32,872 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:32,912 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:32,921 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 135 [2019-01-07 22:14:32,923 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-01-07 22:14:33,159 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 12 dim-0 vars, and 2 xjuncts. [2019-01-07 22:14:33,160 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-01-07 22:14:33,274 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,277 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,282 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,285 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,287 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,289 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,292 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,294 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,295 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,296 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:33,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 25 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 12 case distinctions, treesize of input 111 treesize of output 165 [2019-01-07 22:14:33,346 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-01-07 22:14:33,361 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-01-07 22:14:34,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,422 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,426 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:34,428 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:14:34,429 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 106 treesize of output 126 [2019-01-07 22:14:34,429 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:34,846 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 2 dim-1 vars, End of recursive call: 49 dim-0 vars, and 8 xjuncts. [2019-01-07 22:14:34,847 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-01-07 22:14:35,788 WARN L181 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-01-07 22:14:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:35,790 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:35,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:35,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-01-07 22:14:35,817 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:35,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-01-07 22:14:35,818 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-01-07 22:14:36,823 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-01-07 22:14:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:40,058 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-01-07 22:14:40,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-07 22:14:40,058 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:40,060 INFO L225 Difference]: With dead ends: 155 [2019-01-07 22:14:40,061 INFO L226 Difference]: Without dead ends: 152 [2019-01-07 22:14:40,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-01-07 22:14:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-01-07 22:14:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-01-07 22:14:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-01-07 22:14:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-01-07 22:14:40,082 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-01-07 22:14:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:40,082 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-01-07 22:14:40,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-01-07 22:14:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:40,083 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:40,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:40,083 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:40,084 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-01-07 22:14:40,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:40,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:40,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:40,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:40,085 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:40,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:40,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:40,245 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:40,245 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-01-07 22:14:40,246 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:40,246 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:40,476 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:40,476 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. [2019-01-07 22:14:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:40,477 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:40,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:40,477 INFO 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 [2019-01-07 22:14:40,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:40,485 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:40,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:40,527 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:40,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:40,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:40,546 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,548 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,550 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:40,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,558 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,560 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,562 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:40,571 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,573 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,574 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,577 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:40,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:40,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:40,605 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,680 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,727 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,762 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,791 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,816 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,834 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,853 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:40,899 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,900 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:40,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:40,949 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-07 22:14:40,998 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,000 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,001 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,002 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-07 22:14:41,061 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,062 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,066 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 [2019-01-07 22:14:41,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,142 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,143 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,144 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,145 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,146 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,148 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,149 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,150 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 [2019-01-07 22:14:41,246 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,247 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,250 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,253 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,255 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,256 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,257 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 [2019-01-07 22:14:41,258 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,297 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,338 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,379 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,421 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,464 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,537 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. [2019-01-07 22:14:41,538 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:41,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:41,576 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 [2019-01-07 22:14:41,576 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:41,642 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. [2019-01-07 22:14:41,643 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:41,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:41,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:41,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:14:41,689 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:41,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:14:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:14:41,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:14:41,690 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-01-07 22:14:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:42,042 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-01-07 22:14:42,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:14:42,043 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 22:14:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:42,044 INFO L225 Difference]: With dead ends: 104 [2019-01-07 22:14:42,044 INFO L226 Difference]: Without dead ends: 103 [2019-01-07 22:14:42,045 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 [2019-01-07 22:14:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-01-07 22:14:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-01-07 22:14:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-07 22:14:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-07 22:14:42,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-07 22:14:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:42,061 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-07 22:14:42,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:14:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-07 22:14:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:42,062 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:42,062 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:42,063 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-01-07 22:14:42,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:42,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:42,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:42,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:42,064 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:42,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:42,139 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:42,140 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:42,140 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-01-07 22:14:42,141 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:42,141 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:42,353 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:42,354 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. [2019-01-07 22:14:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:42,354 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:42,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:42,354 INFO 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 [2019-01-07 22:14:42,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:42,363 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:42,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:42,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:42,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 22:14:42,390 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,392 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 22:14:42,401 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,407 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,410 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 22:14:42,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,421 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,427 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 22:14:42,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,438 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,439 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 22:14:42,451 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,458 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,460 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 22:14:42,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 22:14:42,474 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,537 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,599 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,635 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,667 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,689 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,706 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,725 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:42,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 22:14:42,787 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,790 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 22:14:42,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 22:14:42,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,907 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,909 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,910 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,913 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,914 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 22:14:42,986 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,989 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,991 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,992 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,993 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,995 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:42,996 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 22:14:43,085 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,086 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,087 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,089 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,094 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,097 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,097 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 22:14:43,098 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,137 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,176 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,213 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,253 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,295 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,365 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. [2019-01-07 22:14:43,366 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 22:14:43,397 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:43,398 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-07 22:14:43,399 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:43,465 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. [2019-01-07 22:14:43,465 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-07 22:14:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:43,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:43,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:43,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:14:43,514 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:43,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:14:43,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:14:43,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:14:43,515 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-01-07 22:14:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:43,863 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-01-07 22:14:43,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:14:43,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 22:14:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:43,865 INFO L225 Difference]: With dead ends: 108 [2019-01-07 22:14:43,865 INFO L226 Difference]: Without dead ends: 107 [2019-01-07 22:14:43,865 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 [2019-01-07 22:14:43,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-01-07 22:14:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-01-07 22:14:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-01-07 22:14:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-01-07 22:14:43,885 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-01-07 22:14:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:43,885 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-01-07 22:14:43,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:14:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-01-07 22:14:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:43,886 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:43,886 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:43,886 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:43,887 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-01-07 22:14:43,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:43,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:43,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:43,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:43,888 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:44,113 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2019-01-07 22:14:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:44,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:44,144 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:44,145 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:44,145 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-01-07 22:14:44,146 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:44,146 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:44,449 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:44,449 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. [2019-01-07 22:14:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:44,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:44,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:44,449 INFO 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 [2019-01-07 22:14:44,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:44,458 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:44,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:44,502 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:44,556 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-07 22:14:44,611 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,613 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,614 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,615 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-01-07 22:14:44,677 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,678 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,679 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,681 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,682 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,683 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,684 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 [2019-01-07 22:14:44,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,763 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-01-07 22:14:44,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,863 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,865 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,867 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,869 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,870 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,871 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,872 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:44,873 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 [2019-01-07 22:14:44,874 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:44,915 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:44,956 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:44,999 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,043 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,084 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:45,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:45,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:45,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:45,153 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:45,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:45,160 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:45,173 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:45,173 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,228 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,271 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,305 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,331 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,353 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,391 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,408 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,498 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. [2019-01-07 22:14:45,499 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:45,551 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,552 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 [2019-01-07 22:14:45,552 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,619 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. [2019-01-07 22:14:45,619 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:45,691 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,714 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,757 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,759 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,760 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,761 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,762 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:45,764 INFO L303 Elim1Store]: Index analysis took 116 ms [2019-01-07 22:14:45,765 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 [2019-01-07 22:14:45,766 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:45,838 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. [2019-01-07 22:14:45,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-07 22:14:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:45,864 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:45,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:45,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 22:14:45,916 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:45,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:45,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-01-07 22:14:45,917 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-01-07 22:14:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:47,979 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-01-07 22:14:47,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 22:14:47,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:47,982 INFO L225 Difference]: With dead ends: 154 [2019-01-07 22:14:47,982 INFO L226 Difference]: Without dead ends: 153 [2019-01-07 22:14:47,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:14:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-01-07 22:14:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-01-07 22:14:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-01-07 22:14:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-01-07 22:14:48,006 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-01-07 22:14:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:48,007 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-01-07 22:14:48,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-01-07 22:14:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:48,007 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:48,008 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:48,008 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-01-07 22:14:48,008 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:48,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:48,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:48,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:48,009 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:48,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:48,179 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:48,180 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:48,180 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-01-07 22:14:48,184 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:48,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:48,443 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:48,443 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. [2019-01-07 22:14:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:48,444 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:48,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:48,444 INFO 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 [2019-01-07 22:14:48,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:48,453 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:48,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:48,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:48,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:48,504 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,506 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:48,514 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,516 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:48,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,532 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:48,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,540 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,544 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,545 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:48,552 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,553 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,554 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,555 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,557 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,559 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,560 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:48,572 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:48,573 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,635 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,683 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,721 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,749 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,775 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,796 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,815 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:48,860 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,861 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-01-07 22:14:48,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,907 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 [2019-01-07 22:14:48,958 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,960 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,962 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:48,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-01-07 22:14:49,023 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,025 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,026 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,027 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,028 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,029 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,030 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-01-07 22:14:49,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,110 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,111 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,112 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,113 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,114 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,115 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 22:14:49,219 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-01-07 22:14:49,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,224 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,225 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,226 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,227 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,230 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,232 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,234 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 [2019-01-07 22:14:49,235 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,276 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,316 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,358 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,399 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,439 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,513 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. [2019-01-07 22:14:49,513 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:49,602 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,603 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-07 22:14:49,603 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,672 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. [2019-01-07 22:14:49,672 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:49,702 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:49,711 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 [2019-01-07 22:14:49,712 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:49,785 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. [2019-01-07 22:14:49,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-07 22:14:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:49,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:49,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:49,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 22:14:49,859 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:49,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 22:14:49,860 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-01-07 22:14:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:50,558 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-01-07 22:14:50,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 22:14:50,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:50,560 INFO L225 Difference]: With dead ends: 148 [2019-01-07 22:14:50,560 INFO L226 Difference]: Without dead ends: 146 [2019-01-07 22:14:50,561 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-01-07 22:14:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-01-07 22:14:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-01-07 22:14:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-01-07 22:14:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-01-07 22:14:50,582 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-01-07 22:14:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:50,582 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-01-07 22:14:50,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-01-07 22:14:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:50,583 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:50,583 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:50,584 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-01-07 22:14:50,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:50,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:50,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:50,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:50,585 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:50,857 WARN L181 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-01-07 22:14:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:50,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:50,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:50,878 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:50,878 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-01-07 22:14:50,879 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:50,880 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:51,155 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:51,155 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. [2019-01-07 22:14:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:51,155 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:51,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:51,155 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 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 [2019-01-07 22:14:51,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:51,165 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:51,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:51,207 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:51,210 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:51,221 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,223 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,223 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:51,229 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,231 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,233 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:51,239 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,241 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,243 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,245 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,246 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:51,254 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,257 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,261 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,262 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:51,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,268 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,269 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,271 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,273 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,275 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:51,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:51,289 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,349 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,393 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,430 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,459 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,484 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,505 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,524 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,569 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-01-07 22:14:51,617 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,618 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-01-07 22:14:51,666 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,668 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,669 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,670 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,671 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 [2019-01-07 22:14:51,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,735 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,737 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 [2019-01-07 22:14:51,812 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,814 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,818 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,819 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,820 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,821 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 22:14:51,915 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,916 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,917 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,918 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,919 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,921 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,922 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,923 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,924 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,925 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:51,926 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 [2019-01-07 22:14:51,927 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:51,968 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,005 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,047 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,089 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,126 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,199 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. [2019-01-07 22:14:52,200 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:52,251 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,251 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 [2019-01-07 22:14:52,252 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,320 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. [2019-01-07 22:14:52,321 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:52,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,346 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,350 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:52,353 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:14:52,354 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 141 [2019-01-07 22:14:52,354 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:52,425 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. [2019-01-07 22:14:52,425 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-01-07 22:14:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:54,448 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:54,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:54,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-01-07 22:14:54,489 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:54,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:54,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:54,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=66, Unknown=1, NotChecked=0, Total=110 [2019-01-07 22:14:54,490 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-01-07 22:14:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:55,002 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-01-07 22:14:55,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-07 22:14:55,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:14:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:55,004 INFO L225 Difference]: With dead ends: 145 [2019-01-07 22:14:55,005 INFO L226 Difference]: Without dead ends: 143 [2019-01-07 22:14:55,005 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=61, Invalid=94, Unknown=1, NotChecked=0, Total=156 [2019-01-07 22:14:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-01-07 22:14:55,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-01-07 22:14:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-07 22:14:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-01-07 22:14:55,030 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-01-07 22:14:55,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:55,030 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-01-07 22:14:55,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:14:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-01-07 22:14:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:55,031 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:55,031 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:55,031 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:55,032 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-01-07 22:14:55,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:55,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:55,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:55,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:55,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:55,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:55,106 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:55,106 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:55,106 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-01-07 22:14:55,106 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:55,107 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:55,287 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:55,287 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. [2019-01-07 22:14:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:55,287 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:55,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:55,288 INFO 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 [2019-01-07 22:14:55,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:55,296 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:55,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:55,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:55,314 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 22:14:55,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,326 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,326 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 22:14:55,336 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,338 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,340 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,341 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 22:14:55,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 22:14:55,363 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,369 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,371 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,372 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 22:14:55,380 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,388 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,389 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 22:14:55,401 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 22:14:55,402 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,461 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,505 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,541 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,568 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,592 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,612 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,631 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:55,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 22:14:55,690 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,693 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 22:14:55,739 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,740 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,743 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,744 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 22:14:55,801 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,802 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,803 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,805 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,806 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,808 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,809 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 22:14:55,879 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,880 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,882 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,883 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,884 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,885 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,886 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,889 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 22:14:55,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,984 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,985 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,987 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,988 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:55,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 22:14:55,991 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,028 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,067 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,107 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,146 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,189 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,257 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. [2019-01-07 22:14:56,258 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 22:14:56,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:56,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-07 22:14:56,313 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:56,375 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. [2019-01-07 22:14:56,375 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-07 22:14:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:56,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:56,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:56,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:14:56,455 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:56,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:14:56,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:14:56,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:14:56,456 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-01-07 22:14:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:14:56,964 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-01-07 22:14:56,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:14:56,965 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 22:14:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:14:56,967 INFO L225 Difference]: With dead ends: 124 [2019-01-07 22:14:56,967 INFO L226 Difference]: Without dead ends: 123 [2019-01-07 22:14:56,967 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 [2019-01-07 22:14:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-01-07 22:14:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-01-07 22:14:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-01-07 22:14:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-01-07 22:14:56,990 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-01-07 22:14:56,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:14:56,990 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-01-07 22:14:56,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:14:56,990 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-01-07 22:14:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:14:56,991 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:14:56,991 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:14:56,991 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:14:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:56,991 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-01-07 22:14:56,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:14:56,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:56,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:56,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:14:56,992 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:14:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:57,306 WARN L181 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-01-07 22:14:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:57,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:57,384 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:14:57,384 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:14:57,384 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-01-07 22:14:57,385 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:14:57,385 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:14:57,746 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:14:57,746 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. [2019-01-07 22:14:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:14:57,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:14:57,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:14:57,746 INFO 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 [2019-01-07 22:14:57,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:14:57,755 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:14:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:14:57,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:14:57,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:14:57,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:14:57,815 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,817 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,817 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:14:57,821 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,825 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,826 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:14:57,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,839 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:14:57,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,849 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:14:57,857 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,859 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,861 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,862 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,864 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,866 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:57,867 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:14:57,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:14:57,880 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:57,960 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,020 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,057 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,087 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,113 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,133 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,153 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,200 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-01-07 22:14:58,248 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,249 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,250 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-01-07 22:14:58,297 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,299 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,300 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,301 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,302 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 [2019-01-07 22:14:58,361 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,362 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,364 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,365 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,366 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,367 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,368 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 [2019-01-07 22:14:58,480 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-01-07 22:14:58,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,484 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,486 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,487 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,488 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,489 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,490 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,491 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-01-07 22:14:58,584 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,586 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,588 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,589 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,590 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,596 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 [2019-01-07 22:14:58,597 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,636 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,676 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,717 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,759 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,802 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:14:58,875 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. [2019-01-07 22:14:58,875 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:14:58,990 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:58,990 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-07 22:14:58,991 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:59,057 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. [2019-01-07 22:14:59,057 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-01-07 22:14:59,102 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,103 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,104 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,106 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,107 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,108 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,140 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:14:59,187 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-01-07 22:14:59,188 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:14:59,264 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. [2019-01-07 22:14:59,264 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-01-07 22:14:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:59,288 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:14:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:14:59,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:14:59,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-01-07 22:14:59,334 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:14:59,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-01-07 22:14:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-01-07 22:14:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-01-07 22:14:59,335 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-01-07 22:15:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:15:00,264 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-01-07 22:15:00,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 22:15:00,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-01-07 22:15:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:15:00,267 INFO L225 Difference]: With dead ends: 176 [2019-01-07 22:15:00,267 INFO L226 Difference]: Without dead ends: 174 [2019-01-07 22:15:00,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-01-07 22:15:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-01-07 22:15:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-01-07 22:15:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-07 22:15:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-07 22:15:00,296 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-07 22:15:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:15:00,296 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-07 22:15:00,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-01-07 22:15:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-07 22:15:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-01-07 22:15:00,297 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:15:00,297 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-01-07 22:15:00,298 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:15:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-01-07 22:15:00,298 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:15:00,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:00,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:00,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:00,299 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:15:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:00,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:00,399 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:15:00,399 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-01-07 22:15:00,399 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-01-07 22:15:00,400 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:15:00,400 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:15:00,599 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:15:00,599 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. [2019-01-07 22:15:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:00,600 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:15:00,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:00,600 INFO 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 [2019-01-07 22:15:00,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:00,610 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:15:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:00,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:15:00,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-01-07 22:15:00,641 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,645 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 80 [2019-01-07 22:15:00,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,707 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,711 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,712 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 82 [2019-01-07 22:15:00,764 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,765 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,767 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,768 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,769 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,772 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,773 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 87 [2019-01-07 22:15:00,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,847 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,848 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,850 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,851 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,852 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,854 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,855 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-01-07 22:15:00,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,946 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,956 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:00,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 81 [2019-01-07 22:15:00,958 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:00,995 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,036 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,076 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,118 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,163 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:15:01,220 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-01-07 22:15:01,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2019-01-07 22:15:01,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 17 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 56 [2019-01-07 22:15:01,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2019-01-07 22:15:01,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 96 [2019-01-07 22:15:01,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 122 [2019-01-07 22:15:01,261 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 0 case distinctions, treesize of input 42 treesize of output 121 [2019-01-07 22:15:01,262 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,316 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,358 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,389 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,414 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,434 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,451 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,469 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,539 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. [2019-01-07 22:15:01,539 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-01-07 22:15:01,575 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:01,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 122 [2019-01-07 22:15:01,577 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:01,639 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. [2019-01-07 22:15:01,639 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-01-07 22:15:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:01,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:15:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:01,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:15:01,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-01-07 22:15:01,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:15:01,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-01-07 22:15:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-01-07 22:15:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-01-07 22:15:01,721 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-01-07 22:15:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:15:02,025 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-01-07 22:15:02,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-07 22:15:02,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-01-07 22:15:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:15:02,026 INFO L225 Difference]: With dead ends: 135 [2019-01-07 22:15:02,027 INFO L226 Difference]: Without dead ends: 134 [2019-01-07 22:15:02,027 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 [2019-01-07 22:15:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-01-07 22:15:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-01-07 22:15:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-01-07 22:15:02,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-01-07 22:15:02,049 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-01-07 22:15:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:15:02,049 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-01-07 22:15:02,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-01-07 22:15:02,049 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-01-07 22:15:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 22:15:02,050 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:15:02,050 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 22:15:02,050 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:15:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-01-07 22:15:02,050 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:15:02,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:02,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:02,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:02,051 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:15:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:02,401 WARN L181 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-01-07 22:15:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:02,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:02,517 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:15:02,517 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 22:15:02,517 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-01-07 22:15:02,518 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:15:02,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:15:03,265 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:15:03,265 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-07 22:15:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:03,265 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:15:03,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:03,266 INFO 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 [2019-01-07 22:15:03,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:03,274 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:15:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:03,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:15:03,410 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-01-07 22:15:03,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:15:03,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:15:03,418 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,419 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:15:03,423 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,424 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,425 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:15:03,430 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,432 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,433 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,435 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,436 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:15:03,441 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,442 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,443 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,444 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,446 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:15:03,452 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,453 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,454 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,455 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,456 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,457 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:15:03,464 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,465 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,468 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,473 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:15:03,474 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,551 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,601 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,638 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,670 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,695 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,716 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,736 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:03,791 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,791 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:15:03,844 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,846 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:15:03,904 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,905 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,906 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,908 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:15:03,977 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,978 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,979 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,981 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,982 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,983 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:03,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:15:04,063 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,064 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,065 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,067 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,068 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,069 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,070 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,071 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,072 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 56 treesize of output 116 [2019-01-07 22:15:04,174 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,175 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,176 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,177 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,179 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,180 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,181 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,182 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,183 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,184 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,185 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:15:04,308 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:15:04,312 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,313 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,314 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,315 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,316 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,317 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,318 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,319 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,321 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,322 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,323 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,324 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:15:04,325 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,381 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,437 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,496 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,556 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,616 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,678 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,774 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. [2019-01-07 22:15:04,774 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-07 22:15:04,813 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,813 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:15:04,814 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:04,909 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. [2019-01-07 22:15:04,910 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-07 22:15:04,944 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,945 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,947 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,948 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,949 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,950 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,952 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,953 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:04,953 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:04,955 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 22:15:04,955 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:05,053 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. [2019-01-07 22:15:05,054 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-07 22:15:05,152 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,153 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,154 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,155 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,156 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,157 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,158 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,159 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,161 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,162 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,166 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:05,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 31 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 169 [2019-01-07 22:15:05,168 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:05,265 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:15:05,265 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-01-07 22:15:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:05,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:15:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:05,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:15:05,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-01-07 22:15:05,350 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:15:05,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 22:15:05,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 22:15:05,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-01-07 22:15:05,350 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-01-07 22:15:06,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:15:06,541 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-01-07 22:15:06,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-01-07 22:15:06,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-07 22:15:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:15:06,545 INFO L225 Difference]: With dead ends: 212 [2019-01-07 22:15:06,545 INFO L226 Difference]: Without dead ends: 205 [2019-01-07 22:15:06,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-07 22:15:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-01-07 22:15:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-01-07 22:15:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-01-07 22:15:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-01-07 22:15:06,577 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-01-07 22:15:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:15:06,577 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-01-07 22:15:06,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-07 22:15:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-01-07 22:15:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 22:15:06,578 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:15:06,578 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 22:15:06,579 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:15:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-01-07 22:15:06,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:15:06,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:06,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:06,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:06,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:15:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:06,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:06,770 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:15:06,770 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 22:15:06,770 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-01-07 22:15:06,771 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:15:06,771 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:15:07,458 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:15:07,458 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-07 22:15:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:07,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:15:07,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:07,459 INFO 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 [2019-01-07 22:15:07,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:07,467 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:15:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:07,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:15:07,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:15:07,585 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,587 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,588 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:15:07,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,650 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,653 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,654 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 83 treesize of output 103 [2019-01-07 22:15:07,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,738 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,739 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:15:07,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,842 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,845 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,845 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:15:07,946 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-01-07 22:15:07,954 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,957 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,959 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,961 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,964 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,966 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,968 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,970 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,972 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,975 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:07,976 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:15:08,111 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:15:08,116 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,118 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,119 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,120 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,122 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,123 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,125 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,127 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,129 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,131 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,133 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,134 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:08,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:15:08,135 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,201 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,268 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,337 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,413 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,489 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,564 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:15:08,655 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:15:08,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:15:08,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:15:08,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:15:08,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:15:08,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:15:08,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:15:08,679 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,753 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,797 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,831 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,857 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,877 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,893 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:08,910 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:09,009 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. [2019-01-07 22:15:09,009 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-07 22:15:09,047 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:15:09,048 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:09,144 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. [2019-01-07 22:15:09,144 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-07 22:15:09,186 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,187 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,188 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,189 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,190 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,191 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,192 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,194 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,195 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,195 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:09,196 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 22:15:09,197 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:09,309 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. [2019-01-07 22:15:09,310 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-07 22:15:09,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,347 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,348 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,349 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,351 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,352 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,353 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,354 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,356 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,357 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,358 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,359 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:09,360 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:09,361 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-07 22:15:09,362 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:09,458 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:15:09,459 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-07 22:15:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:09,710 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:15:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:09,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:15:09,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-07 22:15:09,771 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:15:09,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 22:15:09,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 22:15:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-07 22:15:09,771 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-01-07 22:15:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:15:11,585 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-01-07 22:15:11,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-01-07 22:15:11,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-07 22:15:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:15:11,588 INFO L225 Difference]: With dead ends: 169 [2019-01-07 22:15:11,589 INFO L226 Difference]: Without dead ends: 168 [2019-01-07 22:15:11,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-01-07 22:15:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-01-07 22:15:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-01-07 22:15:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-01-07 22:15:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-01-07 22:15:11,626 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-01-07 22:15:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:15:11,626 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-01-07 22:15:11,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-07 22:15:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-01-07 22:15:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 22:15:11,627 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:15:11,627 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 22:15:11,627 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:15:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:11,627 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-01-07 22:15:11,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:15:11,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:11,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:11,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:11,629 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:15:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:12,079 WARN L181 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2019-01-07 22:15:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:12,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:12,118 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:15:12,118 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 22:15:12,118 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-01-07 22:15:12,120 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:15:12,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:15:12,913 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:15:12,913 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-07 22:15:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:12,913 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:15:12,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:12,913 INFO 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 [2019-01-07 22:15:12,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:12,922 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:15:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:12,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:15:12,973 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:12,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-01-07 22:15:13,030 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,031 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-01-07 22:15:13,090 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,091 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,092 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,093 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,093 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-01-07 22:15:13,163 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,164 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,165 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,167 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,168 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,169 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-01-07 22:15:13,259 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,260 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,262 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,263 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,264 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,266 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,267 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,268 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-01-07 22:15:13,375 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,376 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,377 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,379 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,381 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,382 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,383 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,384 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-01-07 22:15:13,514 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-01-07 22:15:13,518 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,519 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,520 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,522 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,523 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,524 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,525 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,528 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,529 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,530 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,531 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:13,532 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 113 [2019-01-07 22:15:13,533 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,594 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,654 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,715 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,780 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,844 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,908 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:13,999 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:15:14,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:15:14,006 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:15:14,008 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 22 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:15:14,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 25 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:15:14,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 27 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:15:14,021 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:15:14,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 153 [2019-01-07 22:15:14,026 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,103 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,146 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,180 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,205 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,227 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,245 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,263 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,361 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. [2019-01-07 22:15:14,362 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-01-07 22:15:14,398 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 159 [2019-01-07 22:15:14,400 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,499 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. [2019-01-07 22:15:14,499 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-01-07 22:15:14,534 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,535 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,536 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,537 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,538 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,539 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,541 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,542 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,543 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,543 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:14,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 166 [2019-01-07 22:15:14,545 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,641 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. [2019-01-07 22:15:14,641 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-01-07 22:15:14,695 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,696 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,697 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,699 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,700 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,701 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,703 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,704 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,705 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,706 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,708 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,709 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,710 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:14,711 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:14,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 170 [2019-01-07 22:15:14,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:14,810 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-01-07 22:15:14,810 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-01-07 22:15:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:14,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:15:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:14,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:15:14,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-01-07 22:15:14,942 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:15:14,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 22:15:14,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 22:15:14,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-01-07 22:15:14,942 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-01-07 22:15:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-07 22:15:16,440 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-01-07 22:15:16,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-01-07 22:15:16,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-01-07 22:15:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-07 22:15:16,443 INFO L225 Difference]: With dead ends: 176 [2019-01-07 22:15:16,443 INFO L226 Difference]: Without dead ends: 172 [2019-01-07 22:15:16,444 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-01-07 22:15:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-01-07 22:15:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-01-07 22:15:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-01-07 22:15:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-01-07 22:15:16,478 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-01-07 22:15:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-07 22:15:16,478 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-01-07 22:15:16,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-01-07 22:15:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-01-07 22:15:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-01-07 22:15:16,479 INFO L394 BasicCegarLoop]: Found error trace [2019-01-07 22:15:16,479 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-01-07 22:15:16,479 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT]=== [2019-01-07 22:15:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-01-07 22:15:16,479 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-01-07 22:15:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:16,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:16,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-07 22:15:16,480 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-01-07 22:15:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:16,651 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-01-07 22:15:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:16,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:16,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-01-07 22:15:16,696 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-01-07 22:15:16,696 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-01-07 22:15:16,698 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-01-07 22:15:16,698 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-01-07 22:15:17,398 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-01-07 22:15:17,399 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 times. Merged at 2 different actions 2 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 0 variables. [2019-01-07 22:15:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-07 22:15:17,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-01-07 22:15:17,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-07 22:15:17,399 INFO 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 [2019-01-07 22:15:17,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-07 22:15:17,407 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-01-07 22:15:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-07 22:15:17,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-07 22:15:17,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,469 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 91 treesize of output 91 [2019-01-07 22:15:17,526 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,527 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,528 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 [2019-01-07 22:15:17,579 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,581 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,582 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,583 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,584 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 [2019-01-07 22:15:17,643 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,644 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,646 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,647 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,648 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,649 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,650 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 [2019-01-07 22:15:17,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,723 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,731 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 [2019-01-07 22:15:17,823 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,824 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,826 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,827 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,828 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,829 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,831 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,833 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:17,835 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 [2019-01-07 22:15:17,836 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:17,875 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:17,917 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:17,960 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,003 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,045 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,100 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2019-01-07 22:15:18,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 36 [2019-01-07 22:15:18,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-01-07 22:15:18,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-01-07 22:15:18,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-01-07 22:15:18,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-01-07 22:15:18,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-01-07 22:15:18,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 125 [2019-01-07 22:15:18,156 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,213 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,256 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,288 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,312 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,333 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,351 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,367 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-01-07 22:15:18,450 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. [2019-01-07 22:15:18,450 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-01-07 22:15:18,512 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:18,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 0 new quantified variables, introduced 14 case distinctions, treesize of input 51 treesize of output 153 [2019-01-07 22:15:18,567 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-01-07 22:15:18,605 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-01-07 22:15:20,055 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 41 dim-0 vars, and 8 xjuncts. [2019-01-07 22:15:20,056 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:950 [2019-01-07 22:15:23,334 WARN L181 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 478 DAG size of output: 183 [2019-01-07 22:15:23,344 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,345 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,345 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:23,346 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 128 treesize of output 146 [2019-01-07 22:15:23,346 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:23,591 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,592 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,593 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,594 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,595 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,596 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,598 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,599 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,600 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 142 [2019-01-07 22:15:23,600 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:23,832 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,834 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,835 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,836 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,837 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,838 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,839 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,840 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,841 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:23,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 178 [2019-01-07 22:15:23,844 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:24,066 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. [2019-01-07 22:15:24,066 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:373, output treesize:277 [2019-01-07 22:15:24,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,467 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,469 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,470 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,471 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,472 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,473 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,474 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,475 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,477 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,478 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,479 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,480 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,481 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,482 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,482 INFO L683 Elim1Store]: detected equality via solver [2019-01-07 22:15:24,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 24 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 147 [2019-01-07 22:15:24,485 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:24,719 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,720 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,721 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,722 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,724 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,725 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,726 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,727 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,728 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,729 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,730 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,731 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,732 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,733 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,734 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,736 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,737 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 27 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 164 [2019-01-07 22:15:24,739 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:24,955 INFO L701 Elim1Store]: detected not equals via solver [2019-01-07 22:15:24,956 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 162 [2019-01-07 22:15:24,957 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-01-07 22:15:25,133 INFO L267 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 3 dim-1 vars, End of recursive call: 18 dim-0 vars, and 3 xjuncts. [2019-01-07 22:15:25,134 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-01-07 22:15:25,363 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-01-07 22:15:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:25,366 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-01-07 22:15:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-07 22:15:25,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-01-07 22:15:25,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-01-07 22:15:25,410 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-01-07 22:15:25,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-01-07 22:15:25,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-01-07 22:15:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-01-07 22:15:25,410 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-01-07 22:15:25,781 WARN L181 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 127 [2019-01-07 22:15:34,907 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-01-07 22:15:34,909 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:102) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:131) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:652) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:256) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:202) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:715) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:628) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:472) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Broken pipe at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:326) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 28 more [2019-01-07 22:15:34,913 INFO L168 Benchmark]: Toolchain (without parser) took 173406.19 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -79.9 MB). Peak memory consumption was 979.2 MB. Max. memory is 7.1 GB. [2019-01-07 22:15:34,913 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 22:15:34,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 22:15:34,914 INFO L168 Benchmark]: Boogie Preprocessor took 30.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2019-01-07 22:15:34,914 INFO L168 Benchmark]: RCFGBuilder took 567.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-01-07 22:15:34,914 INFO L168 Benchmark]: TraceAbstraction took 172729.60 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -101.0 MB). Peak memory consumption was 958.0 MB. Max. memory is 7.1 GB. [2019-01-07 22:15:34,916 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 68.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.55 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 567.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 172729.60 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -101.0 MB). Peak memory consumption was 958.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...