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 0.1.24-1de736e-m [2019-02-15 11:26:11,291 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-02-15 11:26:11,293 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-02-15 11:26:11,304 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-02-15 11:26:11,337 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 [2019-02-15 11:26:11,353 INFO L110 SettingsManager]: Loading preferences was successful [2019-02-15 11:26:11,353 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-02-15 11:26:11,354 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2019-02-15 11:26:11,355 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2019-02-15 11:26:11,355 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-02-15 11:26:11,356 INFO L133 SettingsManager]: * User list type=DISABLED [2019-02-15 11:26:11,356 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2019-02-15 11:26:11,356 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-02-15 11:26:11,356 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-02-15 11:26:11,356 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2019-02-15 11:26:11,357 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2019-02-15 11:26:11,357 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-02-15 11:26:11,357 INFO L133 SettingsManager]: * Interval Domain=false [2019-02-15 11:26:11,358 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-02-15 11:26:11,359 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-02-15 11:26:11,359 INFO L133 SettingsManager]: * Use SBE=true [2019-02-15 11:26:11,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-02-15 11:26:11,359 INFO L133 SettingsManager]: * sizeof long=4 [2019-02-15 11:26:11,360 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-02-15 11:26:11,361 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-02-15 11:26:11,361 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-02-15 11:26:11,361 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-02-15 11:26:11,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-02-15 11:26:11,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-02-15 11:26:11,362 INFO L133 SettingsManager]: * sizeof long double=12 [2019-02-15 11:26:11,362 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-02-15 11:26:11,362 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-02-15 11:26:11,363 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-02-15 11:26:11,363 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-02-15 11:26:11,363 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-02-15 11:26:11,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-02-15 11:26:11,364 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-02-15 11:26:11,364 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-02-15 11:26:11,364 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-02-15 11:26:11,364 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-02-15 11:26:11,365 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-02-15 11:26:11,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-02-15 11:26:11,365 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-02-15 11:26:11,365 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-02-15 11:26:11,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-02-15 11:26:11,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-02-15 11:26:11,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-02-15 11:26:11,428 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-02-15 11:26:11,429 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2019-02-15 11:26:11,430 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl [2019-02-15 11:26:11,430 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-8-unlimited.bpl' [2019-02-15 11:26:11,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-02-15 11:26:11,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-02-15 11:26:11,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-02-15 11:26:11,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-02-15 11:26:11,472 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-02-15 11:26:11,488 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,504 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-02-15 11:26:11,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-02-15 11:26:11,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-02-15 11:26:11,544 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-02-15 11:26:11,556 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,557 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,560 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,561 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,566 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,572 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,574 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 15.02 11:26:11" (1/1) ... [2019-02-15 11:26:11,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-02-15 11:26:11,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-02-15 11:26:11,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-02-15 11:26:11,583 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-02-15 11:26:11,584 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 15.02 11:26:11" (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 [2019-02-15 11:26:11,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-02-15 11:26:11,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-02-15 11:26:12,093 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-02-15 11:26:12,093 INFO L286 CfgBuilder]: Removed 19 assue(true) statements. [2019-02-15 11:26:12,095 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:26:12 BoogieIcfgContainer [2019-02-15 11:26:12,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-02-15 11:26:12,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-02-15 11:26:12,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-02-15 11:26:12,100 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-02-15 11:26:12,100 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 15.02 11:26:11" (1/2) ... [2019-02-15 11:26:12,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48153f67 and model type speedup-poc-dd-8-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:26:12, skipping insertion in model container [2019-02-15 11:26:12,101 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 15.02 11:26:12" (2/2) ... [2019-02-15 11:26:12,103 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-8-unlimited.bpl [2019-02-15 11:26:12,112 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-02-15 11:26:12,120 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-02-15 11:26:12,137 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-02-15 11:26:12,170 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-02-15 11:26:12,170 INFO L383 AbstractCegarLoop]: Hoare is true [2019-02-15 11:26:12,171 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-02-15 11:26:12,171 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-02-15 11:26:12,171 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-02-15 11:26:12,171 INFO L387 AbstractCegarLoop]: Difference is false [2019-02-15 11:26:12,171 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-02-15 11:26:12,172 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-02-15 11:26:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-02-15 11:26:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2019-02-15 11:26:12,194 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:12,195 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2019-02-15 11:26:12,198 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-02-15 11:26:12,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:12,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:12,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:12,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:12,262 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:12,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 11:26:12,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-15 11:26:12,440 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:26:12,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-15 11:26:12,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-15 11:26:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 11:26:12,463 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-02-15 11:26:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:12,698 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-02-15 11:26:12,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 11:26:12,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2019-02-15 11:26:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:12,718 INFO L225 Difference]: With dead ends: 37 [2019-02-15 11:26:12,718 INFO L226 Difference]: Without dead ends: 32 [2019-02-15 11:26:12,724 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 [2019-02-15 11:26:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-02-15 11:26:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2019-02-15 11:26:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-02-15 11:26:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 33 transitions. [2019-02-15 11:26:12,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 33 transitions. Word has length 2 [2019-02-15 11:26:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:12,765 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 33 transitions. [2019-02-15 11:26:12,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-15 11:26:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 33 transitions. [2019-02-15 11:26:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:26:12,766 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:12,766 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:26:12,781 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash 30818, now seen corresponding path program 1 times [2019-02-15 11:26:12,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:12,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:12,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:12,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:12,787 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:13,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:13,096 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:13,098 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 11:26:13,100 INFO L207 CegarAbsIntRunner]: [0], [32], [35] [2019-02-15 11:26:13,156 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:13,156 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:17,249 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:17,251 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. [2019-02-15 11:26:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:17,259 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:17,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:17,259 INFO 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 [2019-02-15 11:26:17,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:17,274 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:17,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:17,565 WARN L181 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-15 11:26:17,595 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 [2019-02-15 11:26:17,618 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 [2019-02-15 11:26:17,656 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,685 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 11:26:17,707 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,730 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 [2019-02-15 11:26:17,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,755 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,757 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,769 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 11:26:17,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,791 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,798 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 [2019-02-15 11:26:17,828 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,926 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,927 INFO L303 Elim1Store]: Index analysis took 125 ms [2019-02-15 11:26:17,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:26:17,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:17,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:18,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:18,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:18,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:18,103 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:18,130 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:18,131 INFO L303 Elim1Store]: Index analysis took 198 ms [2019-02-15 11:26:18,132 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 [2019-02-15 11:26:18,135 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:18,513 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:18,915 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:18,993 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:19,030 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:19,062 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:19,082 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:19,104 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:19,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:26:19,316 WARN L181 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-02-15 11:26:19,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,354 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 [2019-02-15 11:26:19,436 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,439 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,444 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 11:26:19,608 WARN L181 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2019-02-15 11:26:19,612 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:26:19,787 WARN L181 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-15 11:26:19,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 11:26:19,974 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 11:26:19,984 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,996 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,997 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:19,998 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,001 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 11:26:20,145 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:26:20,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,163 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,166 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,169 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 [2019-02-15 11:26:20,171 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,232 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,358 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,420 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,482 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,546 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,610 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:20,722 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. [2019-02-15 11:26:20,722 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:147, output treesize:153 [2019-02-15 11:26:20,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:20,800 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 [2019-02-15 11:26:20,802 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:21,024 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. [2019-02-15 11:26:21,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:163, output treesize:125 [2019-02-15 11:26:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:21,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:21,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:26:21,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:26:21,112 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:26:21,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:26:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:26:21,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:26:21,113 INFO L87 Difference]: Start difference. First operand 18 states and 33 transitions. Second operand 6 states. [2019-02-15 11:26:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:32,793 INFO L93 Difference]: Finished difference Result 63 states and 92 transitions. [2019-02-15 11:26:32,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:26:32,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 11:26:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:32,796 INFO L225 Difference]: With dead ends: 63 [2019-02-15 11:26:32,797 INFO L226 Difference]: Without dead ends: 60 [2019-02-15 11:26:32,798 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 [2019-02-15 11:26:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-15 11:26:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 25. [2019-02-15 11:26:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-02-15 11:26:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 53 transitions. [2019-02-15 11:26:32,806 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 53 transitions. Word has length 3 [2019-02-15 11:26:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:32,806 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 53 transitions. [2019-02-15 11:26:32,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:26:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 53 transitions. [2019-02-15 11:26:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:26:32,807 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:32,807 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:26:32,808 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash 30384, now seen corresponding path program 1 times [2019-02-15 11:26:32,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:32,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:32,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:32,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:32,809 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:32,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:32,903 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:32,904 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 11:26:32,904 INFO L207 CegarAbsIntRunner]: [0], [18], [35] [2019-02-15 11:26:32,908 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:32,908 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:33,265 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:33,266 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. [2019-02-15 11:26:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:33,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:33,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:33,267 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:26:33,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:33,283 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:33,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:33,531 WARN L181 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-15 11:26:33,546 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 [2019-02-15 11:26:33,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:26:33,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,621 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,622 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 [2019-02-15 11:26:33,655 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,663 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 [2019-02-15 11:26:33,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,680 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 [2019-02-15 11:26:33,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,703 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 [2019-02-15 11:26:33,727 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:33,738 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 [2019-02-15 11:26:33,815 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 [2019-02-15 11:26:33,816 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:33,880 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,118 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,154 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,184 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,252 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,273 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,301 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,349 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 11:26:34,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,399 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,401 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 [2019-02-15 11:26:34,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:26:34,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,550 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,551 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 [2019-02-15 11:26:34,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,634 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 11:26:34,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:34,745 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 [2019-02-15 11:26:34,747 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,789 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,829 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,872 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,913 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:34,969 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:35,067 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. [2019-02-15 11:26:35,067 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 11:26:35,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:35,134 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 [2019-02-15 11:26:35,135 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:35,220 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. [2019-02-15 11:26:35,221 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 11:26:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:35,257 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:35,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:26:35,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:26:35,299 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:26:35,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:26:35,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:26:35,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:26:35,300 INFO L87 Difference]: Start difference. First operand 25 states and 53 transitions. Second operand 6 states. [2019-02-15 11:26:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:36,279 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2019-02-15 11:26:36,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:26:36,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 11:26:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:36,283 INFO L225 Difference]: With dead ends: 62 [2019-02-15 11:26:36,283 INFO L226 Difference]: Without dead ends: 60 [2019-02-15 11:26:36,284 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 [2019-02-15 11:26:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-02-15 11:26:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 26. [2019-02-15 11:26:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-15 11:26:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 61 transitions. [2019-02-15 11:26:36,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 61 transitions. Word has length 3 [2019-02-15 11:26:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:36,291 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 61 transitions. [2019-02-15 11:26:36,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:26:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 61 transitions. [2019-02-15 11:26:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:26:36,291 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:36,291 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:26:36,292 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash 30944, now seen corresponding path program 1 times [2019-02-15 11:26:36,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:36,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:36,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:36,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:36,293 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:36,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-02-15 11:26:36,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-02-15 11:26:36,348 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:26:36,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-02-15 11:26:36,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-02-15 11:26:36,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-02-15 11:26:36,349 INFO L87 Difference]: Start difference. First operand 26 states and 61 transitions. Second operand 3 states. [2019-02-15 11:26:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:36,437 INFO L93 Difference]: Finished difference Result 31 states and 61 transitions. [2019-02-15 11:26:36,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 11:26:36,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-02-15 11:26:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:36,438 INFO L225 Difference]: With dead ends: 31 [2019-02-15 11:26:36,438 INFO L226 Difference]: Without dead ends: 30 [2019-02-15 11:26:36,439 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 [2019-02-15 11:26:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-02-15 11:26:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-02-15 11:26:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-02-15 11:26:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 60 transitions. [2019-02-15 11:26:36,446 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 60 transitions. Word has length 3 [2019-02-15 11:26:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:36,446 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 60 transitions. [2019-02-15 11:26:36,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-02-15 11:26:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 60 transitions. [2019-02-15 11:26:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:26:36,447 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:36,447 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:26:36,447 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:36,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash 30012, now seen corresponding path program 1 times [2019-02-15 11:26:36,448 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:36,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:36,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:36,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:36,449 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:36,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:36,559 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:36,560 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 11:26:36,560 INFO L207 CegarAbsIntRunner]: [0], [6], [35] [2019-02-15 11:26:36,563 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:36,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:36,862 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:36,862 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. [2019-02-15 11:26:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:36,863 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:36,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:36,863 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:26:36,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:36,879 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:36,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:37,118 WARN L181 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-15 11:26:37,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:26:37,259 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-02-15 11:26:37,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 11:26:37,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,321 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,322 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,325 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 [2019-02-15 11:26:37,712 WARN L181 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-02-15 11:26:37,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,722 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:26:37,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,799 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,802 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,803 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,804 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 11:26:37,943 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:37,971 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 [2019-02-15 11:26:37,972 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,039 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,082 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,149 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,242 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,328 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,397 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-15 11:26:38,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:26:38,407 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:26:38,411 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 [2019-02-15 11:26:38,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 20 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 11:26:38,421 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 [2019-02-15 11:26:38,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 126 [2019-02-15 11:26:38,453 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:26:38,454 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,525 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,567 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,600 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,625 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,747 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,766 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,783 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:38,857 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. [2019-02-15 11:26:38,858 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 9 variables, input treesize:121, output treesize:125 [2019-02-15 11:26:38,928 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:38,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:26:38,931 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,000 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. [2019-02-15 11:26:39,001 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 11:26:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:39,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:39,049 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-15 11:26:39,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-15 11:26:39,049 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:26:39,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-15 11:26:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-15 11:26:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-15 11:26:39,050 INFO L87 Difference]: Start difference. First operand 26 states and 60 transitions. Second operand 4 states. [2019-02-15 11:26:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:39,126 INFO L93 Difference]: Finished difference Result 32 states and 98 transitions. [2019-02-15 11:26:39,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-02-15 11:26:39,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2019-02-15 11:26:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:39,128 INFO L225 Difference]: With dead ends: 32 [2019-02-15 11:26:39,128 INFO L226 Difference]: Without dead ends: 31 [2019-02-15 11:26:39,128 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 [2019-02-15 11:26:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-02-15 11:26:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-02-15 11:26:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-02-15 11:26:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 97 transitions. [2019-02-15 11:26:39,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 97 transitions. Word has length 3 [2019-02-15 11:26:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:39,136 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 97 transitions. [2019-02-15 11:26:39,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-15 11:26:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 97 transitions. [2019-02-15 11:26:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:26:39,137 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:39,137 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:26:39,137 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash 30136, now seen corresponding path program 1 times [2019-02-15 11:26:39,138 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:39,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:39,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:39,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:39,139 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:39,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:39,254 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:39,254 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 11:26:39,254 INFO L207 CegarAbsIntRunner]: [0], [10], [35] [2019-02-15 11:26:39,257 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:39,257 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:39,546 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:39,546 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. [2019-02-15 11:26:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:39,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:39,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:39,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-02-15 11:26:39,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:39,559 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:39,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:39,628 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 [2019-02-15 11:26:39,633 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 [2019-02-15 11:26:39,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,645 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 32 treesize of output 46 [2019-02-15 11:26:39,657 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,658 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:26:39,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,673 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 [2019-02-15 11:26:39,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,690 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,692 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 [2019-02-15 11:26:39,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,704 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:39,708 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:26:39,770 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 [2019-02-15 11:26:39,771 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,830 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,877 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,915 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,944 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,970 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:39,986 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,006 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,063 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:26:40,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,113 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 [2019-02-15 11:26:40,165 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,175 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,176 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 [2019-02-15 11:26:40,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 11:26:40,364 WARN L181 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-02-15 11:26:40,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,389 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,390 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,394 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,401 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:26:40,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,515 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,518 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 [2019-02-15 11:26:40,519 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,558 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,597 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,638 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,681 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,725 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,800 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. [2019-02-15 11:26:40,800 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 11:26:40,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:40,856 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 [2019-02-15 11:26:40,857 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:40,923 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. [2019-02-15 11:26:40,923 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 11:26:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:40,939 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:40,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:26:40,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:26:40,977 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:26:40,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:26:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:26:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:26:40,979 INFO L87 Difference]: Start difference. First operand 30 states and 97 transitions. Second operand 6 states. [2019-02-15 11:26:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:41,844 INFO L93 Difference]: Finished difference Result 65 states and 143 transitions. [2019-02-15 11:26:41,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:26:41,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 11:26:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:41,845 INFO L225 Difference]: With dead ends: 65 [2019-02-15 11:26:41,845 INFO L226 Difference]: Without dead ends: 64 [2019-02-15 11:26:41,846 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 [2019-02-15 11:26:41,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-02-15 11:26:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2019-02-15 11:26:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-02-15 11:26:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 115 transitions. [2019-02-15 11:26:41,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 115 transitions. Word has length 3 [2019-02-15 11:26:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:41,857 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 115 transitions. [2019-02-15 11:26:41,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:26:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 115 transitions. [2019-02-15 11:26:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-02-15 11:26:41,858 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:41,858 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-02-15 11:26:41,859 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 30632, now seen corresponding path program 1 times [2019-02-15 11:26:41,859 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:41,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:41,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:41,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:41,860 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:41,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:41,974 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:41,974 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2019-02-15 11:26:41,974 INFO L207 CegarAbsIntRunner]: [0], [26], [35] [2019-02-15 11:26:41,976 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:41,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:42,227 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:42,227 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. [2019-02-15 11:26:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:42,228 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:42,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:42,228 INFO 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 [2019-02-15 11:26:42,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:42,243 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:42,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:42,443 WARN L181 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-15 11:26:42,446 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 [2019-02-15 11:26:42,449 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 [2019-02-15 11:26:42,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:26:42,465 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,467 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:26:42,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:26:42,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,496 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,497 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,498 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,500 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 [2019-02-15 11:26:42,504 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:42,510 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 [2019-02-15 11:26:42,693 INFO L303 Elim1Store]: Index analysis took 178 ms [2019-02-15 11:26:42,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:26:42,695 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,074 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,120 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,157 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,188 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,214 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,244 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,264 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,317 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,318 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:26:43,367 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,369 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 [2019-02-15 11:26:43,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,423 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,424 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 11:26:43,505 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,508 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,509 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,510 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,513 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 11:26:43,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,589 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,594 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 [2019-02-15 11:26:43,687 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,688 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,691 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,692 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,693 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,694 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,698 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:43,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 85 [2019-02-15 11:26:43,700 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,738 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,779 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,820 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,862 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,905 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:43,978 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. [2019-02-15 11:26:43,979 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 11:26:44,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:44,073 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 [2019-02-15 11:26:44,074 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:44,159 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. [2019-02-15 11:26:44,160 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 11:26:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:44,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:44,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:26:44,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:26:44,216 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:26:44,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:26:44,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:26:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:26:44,217 INFO L87 Difference]: Start difference. First operand 32 states and 115 transitions. Second operand 6 states. [2019-02-15 11:26:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:44,957 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2019-02-15 11:26:44,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:26:44,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2019-02-15 11:26:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:44,958 INFO L225 Difference]: With dead ends: 67 [2019-02-15 11:26:44,959 INFO L226 Difference]: Without dead ends: 65 [2019-02-15 11:26:44,959 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 [2019-02-15 11:26:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-02-15 11:26:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2019-02-15 11:26:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-02-15 11:26:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 132 transitions. [2019-02-15 11:26:44,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 132 transitions. Word has length 3 [2019-02-15 11:26:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:44,970 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 132 transitions. [2019-02-15 11:26:44,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:26:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 132 transitions. [2019-02-15 11:26:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:26:44,971 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:44,971 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:26:44,971 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 954866, now seen corresponding path program 1 times [2019-02-15 11:26:44,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:44,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:44,972 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:45,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:45,082 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:45,082 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:26:45,083 INFO L207 CegarAbsIntRunner]: [0], [18], [32], [35] [2019-02-15 11:26:45,084 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:45,084 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:45,998 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:45,999 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. [2019-02-15 11:26:45,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:45,999 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:45,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:45,999 INFO 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 [2019-02-15 11:26:46,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:46,009 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:46,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:46,058 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 [2019-02-15 11:26:46,064 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 [2019-02-15 11:26:46,072 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,075 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 [2019-02-15 11:26:46,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,089 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:26:46,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,177 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 [2019-02-15 11:26:46,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,215 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 [2019-02-15 11:26:46,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,258 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,259 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:26:46,273 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,283 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 [2019-02-15 11:26:46,284 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,482 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,584 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,622 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,654 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,680 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,702 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,721 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:46,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:26:46,852 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,855 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 [2019-02-15 11:26:46,952 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,954 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:46,957 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:26:47,034 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,035 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,037 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,041 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,042 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 [2019-02-15 11:26:47,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,146 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:26:47,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,251 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,255 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,256 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,257 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 [2019-02-15 11:26:47,400 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:26:47,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,421 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 [2019-02-15 11:26:47,422 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,479 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,538 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,599 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,661 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,722 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,785 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:47,884 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. [2019-02-15 11:26:47,884 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 11:26:47,923 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:47,925 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 [2019-02-15 11:26:47,926 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:48,023 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. [2019-02-15 11:26:48,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 11:26:48,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,157 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:48,159 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:26:48,160 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 [2019-02-15 11:26:48,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:48,261 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. [2019-02-15 11:26:48,261 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-15 11:26:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:48,320 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:26:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:48,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:26:48,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:26:48,369 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:26:48,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:26:48,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:26:48,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:26:48,370 INFO L87 Difference]: Start difference. First operand 34 states and 132 transitions. Second operand 8 states. [2019-02-15 11:26:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:26:52,751 INFO L93 Difference]: Finished difference Result 82 states and 191 transitions. [2019-02-15 11:26:52,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:26:52,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:26:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:26:52,753 INFO L225 Difference]: With dead ends: 82 [2019-02-15 11:26:52,753 INFO L226 Difference]: Without dead ends: 80 [2019-02-15 11:26:52,754 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 [2019-02-15 11:26:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-15 11:26:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 36. [2019-02-15 11:26:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-02-15 11:26:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 128 transitions. [2019-02-15 11:26:52,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 128 transitions. Word has length 4 [2019-02-15 11:26:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:26:52,764 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 128 transitions. [2019-02-15 11:26:52,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:26:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 128 transitions. [2019-02-15 11:26:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:26:52,764 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:26:52,764 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:26:52,765 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:26:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 955426, now seen corresponding path program 1 times [2019-02-15 11:26:52,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:26:52,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:52,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:52,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:26:52,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:26:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:26:52,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:52,858 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:26:52,858 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:26:52,858 INFO L207 CegarAbsIntRunner]: [0], [32], [36], [37] [2019-02-15 11:26:52,859 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:26:52,860 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:26:54,549 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:26:54,550 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. [2019-02-15 11:26:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:26:54,550 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:26:54,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:26:54,550 INFO 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 [2019-02-15 11:26:54,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:26:54,559 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:26:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:26:54,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:26:54,579 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-15 11:26:54,609 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,614 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:26:54,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,676 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:26:54,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,744 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 [2019-02-15 11:26:54,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,821 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,829 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,832 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 101 [2019-02-15 11:26:54,930 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,932 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,935 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,938 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,951 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:54,952 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 [2019-02-15 11:26:54,953 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,011 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,067 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,126 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,188 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,256 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,388 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 [2019-02-15 11:26:55,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:26:55,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:26:55,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:26:55,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:26:55,458 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 [2019-02-15 11:26:55,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:26:55,501 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 [2019-02-15 11:26:55,502 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,557 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,596 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,628 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,653 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,678 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,693 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,710 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:26:55,781 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. [2019-02-15 11:26:55,781 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 11:26:56,463 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:26:56,524 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 [2019-02-15 11:26:56,525 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-15 11:26:56,579 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-15 11:26:58,507 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. [2019-02-15 11:26:58,507 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:131, output treesize:853 [2019-02-15 11:27:07,829 WARN L181 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 472 DAG size of output: 98 [2019-02-15 11:27:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:07,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:07,858 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-02-15 11:27:07,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2019-02-15 11:27:07,858 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-02-15 11:27:07,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-02-15 11:27:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-02-15 11:27:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-15 11:27:07,859 INFO L87 Difference]: Start difference. First operand 36 states and 128 transitions. Second operand 4 states. [2019-02-15 11:27:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:07,918 INFO L93 Difference]: Finished difference Result 40 states and 140 transitions. [2019-02-15 11:27:07,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-02-15 11:27:07,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-02-15 11:27:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:07,920 INFO L225 Difference]: With dead ends: 40 [2019-02-15 11:27:07,920 INFO L226 Difference]: Without dead ends: 39 [2019-02-15 11:27:07,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-02-15 11:27:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-02-15 11:27:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-02-15 11:27:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-02-15 11:27:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 138 transitions. [2019-02-15 11:27:07,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 138 transitions. Word has length 4 [2019-02-15 11:27:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:07,932 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 138 transitions. [2019-02-15 11:27:07,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-02-15 11:27:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 138 transitions. [2019-02-15 11:27:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:07,933 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:07,933 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:07,934 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 954990, now seen corresponding path program 1 times [2019-02-15 11:27:07,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:07,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:07,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:07,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:07,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:08,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:08,190 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:08,191 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:08,191 INFO L207 CegarAbsIntRunner]: [0], [22], [32], [35] [2019-02-15 11:27:08,192 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:08,192 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:08,848 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:08,849 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. [2019-02-15 11:27:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:08,849 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:08,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:08,850 INFO 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 [2019-02-15 11:27:08,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:08,861 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:08,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:08,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:08,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:09,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,057 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 [2019-02-15 11:27:09,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,122 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,125 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:27:09,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,205 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,212 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 [2019-02-15 11:27:09,295 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,301 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,303 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,305 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,314 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 [2019-02-15 11:27:09,421 WARN L181 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 11:27:09,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,431 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,432 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,434 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,436 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,438 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,441 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:27:09,582 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:27:09,588 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,590 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,598 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:09,609 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 [2019-02-15 11:27:09,610 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:09,672 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:09,744 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:09,821 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:09,894 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:09,971 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,044 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-15 11:27:10,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:27:10,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:27:10,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:27:10,152 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 [2019-02-15 11:27:10,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:27:10,164 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 [2019-02-15 11:27:10,169 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 [2019-02-15 11:27:10,170 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,243 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,287 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,320 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,345 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,365 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,384 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,401 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,501 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. [2019-02-15 11:27:10,502 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 11:27:10,543 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,544 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 51 treesize of output 159 [2019-02-15 11:27:10,544 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,642 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. [2019-02-15 11:27:10,642 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 11:27:10,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:10,683 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 [2019-02-15 11:27:10,684 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:10,806 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. [2019-02-15 11:27:10,807 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-15 11:27:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:10,891 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:10,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:10,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:10,958 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:10,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:10,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:10,959 INFO L87 Difference]: Start difference. First operand 38 states and 138 transitions. Second operand 8 states. [2019-02-15 11:27:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:14,627 INFO L93 Difference]: Finished difference Result 84 states and 220 transitions. [2019-02-15 11:27:14,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:14,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:14,629 INFO L225 Difference]: With dead ends: 84 [2019-02-15 11:27:14,629 INFO L226 Difference]: Without dead ends: 82 [2019-02-15 11:27:14,630 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-15 11:27:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-02-15 11:27:14,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-02-15 11:27:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-15 11:27:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-15 11:27:14,641 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-15 11:27:14,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:14,641 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-15 11:27:14,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-15 11:27:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:14,642 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:14,642 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:14,642 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash 954618, now seen corresponding path program 1 times [2019-02-15 11:27:14,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:14,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:14,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:14,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:14,644 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:14,831 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-02-15 11:27:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:14,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:14,844 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:14,844 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:14,844 INFO L207 CegarAbsIntRunner]: [0], [10], [32], [35] [2019-02-15 11:27:14,846 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:14,846 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:15,439 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:15,440 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. [2019-02-15 11:27:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:15,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:15,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:15,440 INFO 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 [2019-02-15 11:27:15,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:15,457 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:15,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:15,506 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:15,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,586 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,587 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:27:15,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,674 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 [2019-02-15 11:27:15,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,745 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,780 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,781 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 105 [2019-02-15 11:27:15,870 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,879 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:27:15,984 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,985 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,993 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,994 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,995 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:15,996 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 [2019-02-15 11:27:16,124 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:27:16,128 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,129 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,130 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,131 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,132 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:16,142 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 [2019-02-15 11:27:16,143 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,205 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,264 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,325 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,388 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,454 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,521 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,615 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 [2019-02-15 11:27:16,619 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 [2019-02-15 11:27:16,622 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 [2019-02-15 11:27:16,632 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 [2019-02-15 11:27:16,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:27:16,639 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 [2019-02-15 11:27:16,643 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 [2019-02-15 11:27:16,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:27:16,648 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,722 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,765 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,796 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,822 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,844 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,863 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,879 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:16,977 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. [2019-02-15 11:27:16,978 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 11:27:17,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,015 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 [2019-02-15 11:27:17,016 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:17,111 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. [2019-02-15 11:27:17,111 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 11:27:17,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:17,151 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:27:17,152 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 [2019-02-15 11:27:17,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:17,253 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. [2019-02-15 11:27:17,254 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-15 11:27:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:17,318 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:17,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:17,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:17,360 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:17,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:17,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:17,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:17,361 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-15 11:27:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:21,173 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-15 11:27:21,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:21,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:21,175 INFO L225 Difference]: With dead ends: 81 [2019-02-15 11:27:21,175 INFO L226 Difference]: Without dead ends: 80 [2019-02-15 11:27:21,176 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 [2019-02-15 11:27:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-02-15 11:27:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2019-02-15 11:27:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-02-15 11:27:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 174 transitions. [2019-02-15 11:27:21,186 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 174 transitions. Word has length 4 [2019-02-15 11:27:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:21,186 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 174 transitions. [2019-02-15 11:27:21,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 174 transitions. [2019-02-15 11:27:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:21,187 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:21,187 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:21,187 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:21,188 INFO L82 PathProgramCache]: Analyzing trace with hash 955114, now seen corresponding path program 1 times [2019-02-15 11:27:21,188 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:21,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:21,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:21,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:21,189 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:21,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:21,335 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:21,335 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:21,336 INFO L207 CegarAbsIntRunner]: [0], [26], [32], [35] [2019-02-15 11:27:21,337 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:21,337 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:22,054 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:22,054 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. [2019-02-15 11:27:22,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:22,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:22,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:22,055 INFO 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 [2019-02-15 11:27:22,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:22,063 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:22,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:22,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:22,174 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,176 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,177 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:27:22,237 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,244 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,245 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 11:27:22,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,317 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,323 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,329 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,329 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 [2019-02-15 11:27:22,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,421 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,422 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,426 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,428 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,429 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,430 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 [2019-02-15 11:27:22,541 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,544 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,553 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,564 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 [2019-02-15 11:27:22,693 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:27:22,700 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,701 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,702 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,705 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,706 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,709 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,716 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:22,722 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 [2019-02-15 11:27:22,723 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:22,808 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:22,875 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:22,954 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,027 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,105 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,182 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,273 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 [2019-02-15 11:27:23,275 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 [2019-02-15 11:27:23,279 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 [2019-02-15 11:27:23,283 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 [2019-02-15 11:27:23,287 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 [2019-02-15 11:27:23,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:27:23,294 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 [2019-02-15 11:27:23,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:27:23,299 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,372 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,416 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,449 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,476 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,497 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,516 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,531 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,631 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. [2019-02-15 11:27:23,631 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 11:27:23,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,668 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 [2019-02-15 11:27:23,669 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,774 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. [2019-02-15 11:27:23,774 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 11:27:23,805 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,806 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,808 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:23,815 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:27:23,816 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 [2019-02-15 11:27:23,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:23,917 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. [2019-02-15 11:27:23,918 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:105 [2019-02-15 11:27:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:24,068 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:24,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:24,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:24,111 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:24,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:24,111 INFO L87 Difference]: Start difference. First operand 43 states and 174 transitions. Second operand 8 states. [2019-02-15 11:27:25,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:25,868 INFO L93 Difference]: Finished difference Result 81 states and 223 transitions. [2019-02-15 11:27:25,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:25,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:25,877 INFO L225 Difference]: With dead ends: 81 [2019-02-15 11:27:25,877 INFO L226 Difference]: Without dead ends: 79 [2019-02-15 11:27:25,877 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 [2019-02-15 11:27:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-02-15 11:27:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 44. [2019-02-15 11:27:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-02-15 11:27:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 175 transitions. [2019-02-15 11:27:25,888 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 175 transitions. Word has length 4 [2019-02-15 11:27:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:25,889 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 175 transitions. [2019-02-15 11:27:25,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 175 transitions. [2019-02-15 11:27:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:25,889 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:25,890 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:25,890 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 954742, now seen corresponding path program 1 times [2019-02-15 11:27:25,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:25,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:25,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:25,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:26,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:26,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:26,104 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:26,104 INFO L207 CegarAbsIntRunner]: [0], [14], [32], [35] [2019-02-15 11:27:26,105 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:26,105 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:26,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:26,968 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. [2019-02-15 11:27:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:26,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:26,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:26,969 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:27:26,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:26,979 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:26,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:27,043 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 [2019-02-15 11:27:27,047 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 [2019-02-15 11:27:27,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,053 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 [2019-02-15 11:27:27,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,058 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,060 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 [2019-02-15 11:27:27,098 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,116 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2019-02-15 11:27:27,120 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,121 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,123 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,124 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,126 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 100 [2019-02-15 11:27:27,133 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,139 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,142 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 [2019-02-15 11:27:27,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,156 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 [2019-02-15 11:27:27,157 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,238 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,286 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,323 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,355 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,379 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,400 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,421 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:27,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:27,532 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,535 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 [2019-02-15 11:27:27,593 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,594 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,595 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,596 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,597 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 103 [2019-02-15 11:27:27,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:27,672 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 [2019-02-15 11:27:28,595 WARN L181 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2019-02-15 11:27:28,640 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,653 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,697 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:28,775 INFO L303 Elim1Store]: Index analysis took 177 ms [2019-02-15 11:27:28,776 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 [2019-02-15 11:27:29,888 WARN L181 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 11:27:29,931 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:29,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:29,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:29,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,144 INFO L303 Elim1Store]: Index analysis took 253 ms [2019-02-15 11:27:30,145 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 [2019-02-15 11:27:30,471 WARN L181 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:27:30,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,478 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,483 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,486 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:30,490 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 [2019-02-15 11:27:30,491 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,550 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,610 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,669 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,732 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,795 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,859 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:30,975 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. [2019-02-15 11:27:30,975 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:147, output treesize:153 [2019-02-15 11:27:31,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,011 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 [2019-02-15 11:27:31,012 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:31,111 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. [2019-02-15 11:27:31,111 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:163, output treesize:125 [2019-02-15 11:27:31,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,143 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,145 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:31,152 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 [2019-02-15 11:27:31,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:31,248 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. [2019-02-15 11:27:31,249 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:137, output treesize:103 [2019-02-15 11:27:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:31,333 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:31,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:31,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 11:27:31,385 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:31,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 11:27:31,386 INFO L87 Difference]: Start difference. First operand 44 states and 175 transitions. Second operand 8 states. [2019-02-15 11:27:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:34,751 INFO L93 Difference]: Finished difference Result 99 states and 274 transitions. [2019-02-15 11:27:34,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 11:27:34,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:34,754 INFO L225 Difference]: With dead ends: 99 [2019-02-15 11:27:34,754 INFO L226 Difference]: Without dead ends: 95 [2019-02-15 11:27:34,754 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 [2019-02-15 11:27:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-02-15 11:27:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 52. [2019-02-15 11:27:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-02-15 11:27:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 210 transitions. [2019-02-15 11:27:34,766 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 210 transitions. Word has length 4 [2019-02-15 11:27:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:34,766 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 210 transitions. [2019-02-15 11:27:34,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 210 transitions. [2019-02-15 11:27:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:34,767 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:34,767 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:34,767 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:34,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash 941536, now seen corresponding path program 1 times [2019-02-15 11:27:34,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:34,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:34,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:34,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:34,769 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:34,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:34,894 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:34,894 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:34,894 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [35] [2019-02-15 11:27:34,895 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:34,895 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:35,278 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:35,278 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. [2019-02-15 11:27:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:35,278 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:35,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:35,279 INFO 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 [2019-02-15 11:27:35,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:35,296 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:35,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:35,537 WARN L181 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-15 11:27:35,556 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 [2019-02-15 11:27:35,569 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 [2019-02-15 11:27:35,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,632 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 [2019-02-15 11:27:35,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,696 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,722 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 [2019-02-15 11:27:35,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,814 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,835 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,836 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-02-15 11:27:35,836 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 [2019-02-15 11:27:35,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,897 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:35,949 INFO L303 Elim1Store]: Index analysis took 110 ms [2019-02-15 11:27:35,950 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 [2019-02-15 11:27:35,980 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,084 INFO L303 Elim1Store]: Index analysis took 132 ms [2019-02-15 11:27:36,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:27:36,101 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 [2019-02-15 11:27:36,102 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,163 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,212 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,246 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,276 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,302 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,322 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,341 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,388 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,389 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 11:27:36,439 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,440 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,441 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 [2019-02-15 11:27:36,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,495 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,496 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 [2019-02-15 11:27:36,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,558 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 11:27:36,636 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,637 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,638 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,639 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,641 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,644 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,645 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 [2019-02-15 11:27:36,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,747 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,748 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,749 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:36,754 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 [2019-02-15 11:27:36,754 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,796 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,836 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,880 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,923 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:36,965 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:37,036 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. [2019-02-15 11:27:37,036 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:27:37,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,088 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 [2019-02-15 11:27:37,089 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:37,164 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. [2019-02-15 11:27:37,165 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:27:37,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,200 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,201 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,202 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:37,205 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 [2019-02-15 11:27:37,206 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:37,277 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. [2019-02-15 11:27:37,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-15 11:27:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:37,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:37,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:37,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:37,341 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:37,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:37,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:37,342 INFO L87 Difference]: Start difference. First operand 52 states and 210 transitions. Second operand 8 states. [2019-02-15 11:27:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:37,853 INFO L93 Difference]: Finished difference Result 101 states and 289 transitions. [2019-02-15 11:27:37,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:37,854 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:37,855 INFO L225 Difference]: With dead ends: 101 [2019-02-15 11:27:37,855 INFO L226 Difference]: Without dead ends: 99 [2019-02-15 11:27:37,856 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 [2019-02-15 11:27:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-15 11:27:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2019-02-15 11:27:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-02-15 11:27:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 243 transitions. [2019-02-15 11:27:37,870 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 243 transitions. Word has length 4 [2019-02-15 11:27:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:37,870 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 243 transitions. [2019-02-15 11:27:37,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 243 transitions. [2019-02-15 11:27:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:37,871 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:37,871 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:37,871 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:37,872 INFO L82 PathProgramCache]: Analyzing trace with hash 941164, now seen corresponding path program 1 times [2019-02-15 11:27:37,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:37,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:37,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:37,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:37,873 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:37,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:37,960 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:37,960 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:37,960 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [35] [2019-02-15 11:27:37,962 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:37,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:38,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:38,356 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. [2019-02-15 11:27:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:38,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:38,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:38,357 INFO 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 [2019-02-15 11:27:38,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:38,375 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:38,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:38,553 WARN L181 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-02-15 11:27:38,557 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:38,606 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,608 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 [2019-02-15 11:27:38,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:38,665 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 11:27:39,334 WARN L181 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-02-15 11:27:39,373 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:39,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:39,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:39,425 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:39,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:39,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:39,477 INFO L303 Elim1Store]: Index analysis took 141 ms [2019-02-15 11:27:39,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:27:40,308 WARN L181 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-02-15 11:27:40,335 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,406 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,418 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,419 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,420 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,420 INFO L303 Elim1Store]: Index analysis took 111 ms [2019-02-15 11:27:40,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:27:40,524 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,525 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,526 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,527 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,528 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,529 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,530 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,532 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,534 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:40,535 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 [2019-02-15 11:27:40,536 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,578 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,622 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,664 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,709 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,752 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,807 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 [2019-02-15 11:27:40,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:27:40,813 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 [2019-02-15 11:27:40,818 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 [2019-02-15 11:27:40,822 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 [2019-02-15 11:27:40,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:27:40,859 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 [2019-02-15 11:27:40,936 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 [2019-02-15 11:27:40,937 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:40,993 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,035 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,068 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,095 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,382 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,619 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,747 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,822 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. [2019-02-15 11:27:41,822 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:27:41,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,872 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 [2019-02-15 11:27:41,873 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:41,937 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. [2019-02-15 11:27:41,937 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:27:41,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,964 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:41,967 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:27:41,968 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 [2019-02-15 11:27:41,969 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:42,043 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. [2019-02-15 11:27:42,044 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-15 11:27:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:42,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:42,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:42,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:42,156 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:42,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:42,157 INFO L87 Difference]: Start difference. First operand 59 states and 243 transitions. Second operand 8 states. [2019-02-15 11:27:42,483 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-02-15 11:27:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:43,157 INFO L93 Difference]: Finished difference Result 99 states and 302 transitions. [2019-02-15 11:27:43,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:43,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:43,159 INFO L225 Difference]: With dead ends: 99 [2019-02-15 11:27:43,160 INFO L226 Difference]: Without dead ends: 98 [2019-02-15 11:27:43,160 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 [2019-02-15 11:27:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-02-15 11:27:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2019-02-15 11:27:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-02-15 11:27:43,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 261 transitions. [2019-02-15 11:27:43,175 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 261 transitions. Word has length 4 [2019-02-15 11:27:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:43,175 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 261 transitions. [2019-02-15 11:27:43,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 261 transitions. [2019-02-15 11:27:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:43,176 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:43,177 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:43,177 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 941660, now seen corresponding path program 1 times [2019-02-15 11:27:43,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:43,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:43,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:43,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:43,179 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:43,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:43,334 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:43,334 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:43,334 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [35] [2019-02-15 11:27:43,335 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:43,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:43,642 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:43,642 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. [2019-02-15 11:27:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:43,643 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:43,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:43,643 INFO 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 [2019-02-15 11:27:43,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:43,651 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:43,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:43,701 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 [2019-02-15 11:27:43,705 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 [2019-02-15 11:27:43,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,714 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 11:27:43,718 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,719 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,721 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 [2019-02-15 11:27:43,726 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,732 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 [2019-02-15 11:27:43,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,744 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,745 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 [2019-02-15 11:27:43,750 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,751 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,753 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,754 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:43,759 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 [2019-02-15 11:27:43,774 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 [2019-02-15 11:27:43,775 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:43,837 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:43,886 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:43,925 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:43,954 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:43,977 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:43,997 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,037 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,084 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:44,144 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,146 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 84 [2019-02-15 11:27:44,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,198 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,199 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,200 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 86 [2019-02-15 11:27:44,259 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,260 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:27:44,340 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,342 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,345 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,346 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,348 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,349 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 [2019-02-15 11:27:44,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,447 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,452 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,457 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 [2019-02-15 11:27:44,458 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,527 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,567 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,605 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,647 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,690 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,762 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. [2019-02-15 11:27:44,762 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:27:44,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,812 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 [2019-02-15 11:27:44,813 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:44,879 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. [2019-02-15 11:27:44,879 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:27:44,948 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,958 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:44,960 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:27:44,961 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 [2019-02-15 11:27:44,961 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:45,031 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. [2019-02-15 11:27:45,031 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:80 [2019-02-15 11:27:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:45,051 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:45,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:45,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:45,093 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:45,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:45,093 INFO L87 Difference]: Start difference. First operand 61 states and 261 transitions. Second operand 8 states. [2019-02-15 11:27:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:45,779 INFO L93 Difference]: Finished difference Result 101 states and 320 transitions. [2019-02-15 11:27:45,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:45,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:45,781 INFO L225 Difference]: With dead ends: 101 [2019-02-15 11:27:45,781 INFO L226 Difference]: Without dead ends: 99 [2019-02-15 11:27:45,781 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 [2019-02-15 11:27:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-15 11:27:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 62. [2019-02-15 11:27:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-02-15 11:27:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 278 transitions. [2019-02-15 11:27:45,803 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 278 transitions. Word has length 4 [2019-02-15 11:27:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:45,803 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 278 transitions. [2019-02-15 11:27:45,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 278 transitions. [2019-02-15 11:27:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:45,804 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:45,805 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:45,805 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 941288, now seen corresponding path program 1 times [2019-02-15 11:27:45,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:45,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:45,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:45,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:45,806 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:45,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:45,887 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:45,888 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:45,888 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [35] [2019-02-15 11:27:45,889 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:45,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:46,229 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:46,230 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. [2019-02-15 11:27:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:46,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:46,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:46,230 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:27:46,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:46,246 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:46,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:46,310 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 91 [2019-02-15 11:27:46,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:27:46,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,412 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:27:46,511 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,512 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,513 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,514 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,516 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,517 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 91 [2019-02-15 11:27:46,599 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,602 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,603 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,607 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,608 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:27:46,725 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2019-02-15 11:27:46,729 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:46,740 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 [2019-02-15 11:27:46,741 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:46,785 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:46,828 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:46,872 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:46,917 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:46,962 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,018 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 [2019-02-15 11:27:47,022 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:27:47,026 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 [2019-02-15 11:27:47,030 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 [2019-02-15 11:27:47,033 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:27:47,037 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 [2019-02-15 11:27:47,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:27:47,050 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 [2019-02-15 11:27:47,050 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,107 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,150 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,184 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,209 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,231 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,248 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,265 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,339 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. [2019-02-15 11:27:47,340 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:27:47,392 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,393 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 [2019-02-15 11:27:47,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,461 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. [2019-02-15 11:27:47,462 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:27:47,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,489 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,490 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,491 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,492 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,493 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,494 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:47,495 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 [2019-02-15 11:27:47,496 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:47,569 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. [2019-02-15 11:27:47,570 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-15 11:27:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:47,592 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:47,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:47,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:47,632 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:47,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:47,633 INFO L87 Difference]: Start difference. First operand 62 states and 278 transitions. Second operand 8 states. [2019-02-15 11:27:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:48,296 INFO L93 Difference]: Finished difference Result 106 states and 350 transitions. [2019-02-15 11:27:48,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:48,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:48,298 INFO L225 Difference]: With dead ends: 106 [2019-02-15 11:27:48,299 INFO L226 Difference]: Without dead ends: 104 [2019-02-15 11:27:48,299 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-02-15 11:27:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-02-15 11:27:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2019-02-15 11:27:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-02-15 11:27:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 304 transitions. [2019-02-15 11:27:48,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 304 transitions. Word has length 4 [2019-02-15 11:27:48,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:48,312 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 304 transitions. [2019-02-15 11:27:48,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:48,312 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 304 transitions. [2019-02-15 11:27:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:48,313 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:48,313 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:48,313 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash 941784, now seen corresponding path program 1 times [2019-02-15 11:27:48,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:48,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:48,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:48,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:48,315 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:48,587 WARN L181 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2019-02-15 11:27:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:48,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:48,598 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:48,598 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:48,598 INFO L207 CegarAbsIntRunner]: [0], [18], [30], [35] [2019-02-15 11:27:48,599 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:48,599 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:48,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:48,881 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. [2019-02-15 11:27:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:48,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:48,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:48,882 INFO 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 [2019-02-15 11:27:48,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:48,890 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:48,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:48,956 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 [2019-02-15 11:27:48,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:27:48,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,964 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 [2019-02-15 11:27:48,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,973 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 [2019-02-15 11:27:48,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,982 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 [2019-02-15 11:27:48,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,992 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:48,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:27:48,999 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,000 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,001 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,002 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,006 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 [2019-02-15 11:27:49,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:27:49,019 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,079 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,127 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,166 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,194 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,219 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,241 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,261 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,308 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:27:49,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:27:49,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,417 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:27:49,477 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,479 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,480 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,481 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,482 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,484 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 [2019-02-15 11:27:49,559 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,566 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 [2019-02-15 11:27:49,664 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,666 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,667 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,668 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,669 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,673 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:49,675 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 [2019-02-15 11:27:49,676 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,715 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,755 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,795 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,837 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,880 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:49,954 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. [2019-02-15 11:27:49,954 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:27:50,020 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,021 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 [2019-02-15 11:27:50,021 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:50,088 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-02-15 11:27:50,089 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:27:50,147 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,148 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,149 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,151 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:50,156 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 [2019-02-15 11:27:50,157 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:50,225 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. [2019-02-15 11:27:50,225 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:78 [2019-02-15 11:27:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:50,258 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:50,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:50,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:27:50,297 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:50,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:50,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:50,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:27:50,297 INFO L87 Difference]: Start difference. First operand 65 states and 304 transitions. Second operand 8 states. [2019-02-15 11:27:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:51,005 INFO L93 Difference]: Finished difference Result 107 states and 376 transitions. [2019-02-15 11:27:51,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:27:51,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:51,008 INFO L225 Difference]: With dead ends: 107 [2019-02-15 11:27:51,008 INFO L226 Difference]: Without dead ends: 99 [2019-02-15 11:27:51,009 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2019-02-15 11:27:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-02-15 11:27:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2019-02-15 11:27:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-02-15 11:27:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 328 transitions. [2019-02-15 11:27:51,023 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 328 transitions. Word has length 4 [2019-02-15 11:27:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:51,023 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 328 transitions. [2019-02-15 11:27:51,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 328 transitions. [2019-02-15 11:27:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:51,024 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:51,024 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:51,025 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash 930314, now seen corresponding path program 1 times [2019-02-15 11:27:51,025 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:51,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:51,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:51,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:51,026 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:51,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:51,100 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:51,100 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:51,101 INFO L207 CegarAbsIntRunner]: [0], [6], [32], [35] [2019-02-15 11:27:51,102 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:51,102 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:51,799 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:51,800 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. [2019-02-15 11:27:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:51,800 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:51,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:51,800 INFO 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 [2019-02-15 11:27:51,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:51,809 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:51,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:27:51,855 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,855 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:27:51,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,910 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 [2019-02-15 11:27:51,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:51,964 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 [2019-02-15 11:27:52,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,023 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,025 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,027 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,028 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 [2019-02-15 11:27:52,105 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,106 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,107 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,108 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,109 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,114 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 [2019-02-15 11:27:52,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,211 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,213 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,218 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,219 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,220 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:52,221 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 [2019-02-15 11:27:52,221 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,265 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,309 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,354 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,399 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,439 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,494 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 [2019-02-15 11:27:52,497 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:27:52,499 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 [2019-02-15 11:27:52,502 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 [2019-02-15 11:27:52,504 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:27:52,508 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 [2019-02-15 11:27:52,511 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:27:52,526 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 [2019-02-15 11:27:52,527 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,607 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,694 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,898 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,932 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,953 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,971 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:52,988 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:27:53,058 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. [2019-02-15 11:27:53,059 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 11:27:53,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,108 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 [2019-02-15 11:27:53,110 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-02-15 11:27:53,348 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. [2019-02-15 11:27:53,349 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:201 [2019-02-15 11:27:53,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,464 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,468 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,470 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,472 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,473 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:53,525 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 [2019-02-15 11:27:53,525 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-02-15 11:27:53,544 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 64 xjuncts. [2019-02-15 11:27:54,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,628 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:27:54,634 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:27:54,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:27:54,636 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-15 11:27:55,065 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. [2019-02-15 11:27:55,066 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:218, output treesize:686 [2019-02-15 11:27:55,928 WARN L181 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 114 [2019-02-15 11:27:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:55,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:27:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:55,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:27:55,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2019-02-15 11:27:55,972 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:27:55,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:27:55,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:27:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-02-15 11:27:55,973 INFO L87 Difference]: Start difference. First operand 66 states and 328 transitions. Second operand 8 states. [2019-02-15 11:27:56,717 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2019-02-15 11:27:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:27:59,587 INFO L93 Difference]: Finished difference Result 155 states and 556 transitions. [2019-02-15 11:27:59,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-15 11:27:59,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:27:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:27:59,588 INFO L225 Difference]: With dead ends: 155 [2019-02-15 11:27:59,588 INFO L226 Difference]: Without dead ends: 152 [2019-02-15 11:27:59,589 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 [2019-02-15 11:27:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-02-15 11:27:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-02-15 11:27:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-02-15 11:27:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 438 transitions. [2019-02-15 11:27:59,605 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 438 transitions. Word has length 4 [2019-02-15 11:27:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:27:59,605 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 438 transitions. [2019-02-15 11:27:59,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:27:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 438 transitions. [2019-02-15 11:27:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:27:59,606 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:27:59,606 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:27:59,606 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:27:59,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash 930440, now seen corresponding path program 1 times [2019-02-15 11:27:59,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:27:59,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:59,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:59,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:27:59,608 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:27:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:27:59,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:59,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:27:59,790 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:27:59,790 INFO L207 CegarAbsIntRunner]: [0], [6], [36], [37] [2019-02-15 11:27:59,791 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:27:59,791 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:27:59,968 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:27:59,968 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. [2019-02-15 11:27:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:27:59,968 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:27:59,968 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:27:59,969 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:27:59,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:27:59,977 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:27:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:27:59,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:00,020 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 [2019-02-15 11:28:00,024 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:00,028 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,030 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 11:28:00,036 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,038 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:28:00,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,055 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 [2019-02-15 11:28:00,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,072 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 [2019-02-15 11:28:00,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,081 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,086 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,089 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 [2019-02-15 11:28:00,100 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 [2019-02-15 11:28:00,100 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,163 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,210 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,245 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,276 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,301 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,320 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,339 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:00,433 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,435 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,436 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 [2019-02-15 11:28:00,484 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,485 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,487 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,488 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,489 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:00,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,551 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 [2019-02-15 11:28:00,625 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,626 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,627 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,629 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,630 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,631 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,632 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,633 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,634 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 [2019-02-15 11:28:00,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,731 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,736 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:00,741 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 [2019-02-15 11:28:00,742 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,779 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,819 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,859 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,901 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:00,943 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:01,017 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. [2019-02-15 11:28:01,018 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:121, output treesize:125 [2019-02-15 11:28:01,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,056 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 [2019-02-15 11:28:01,057 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:01,122 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. [2019-02-15 11:28:01,123 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:96 [2019-02-15 11:28:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:01,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:01,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:01,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:28:01,170 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:01,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:28:01,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:28:01,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:28:01,170 INFO L87 Difference]: Start difference. First operand 78 states and 438 transitions. Second operand 6 states. [2019-02-15 11:28:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:01,504 INFO L93 Difference]: Finished difference Result 104 states and 471 transitions. [2019-02-15 11:28:01,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:28:01,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 11:28:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:01,506 INFO L225 Difference]: With dead ends: 104 [2019-02-15 11:28:01,506 INFO L226 Difference]: Without dead ends: 103 [2019-02-15 11:28:01,507 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 [2019-02-15 11:28:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-02-15 11:28:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2019-02-15 11:28:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-15 11:28:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-15 11:28:01,525 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-15 11:28:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:01,525 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-15 11:28:01,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:28:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-15 11:28:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:01,526 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:01,526 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:01,527 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:01,527 INFO L82 PathProgramCache]: Analyzing trace with hash 945816, now seen corresponding path program 1 times [2019-02-15 11:28:01,527 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:01,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:01,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:01,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:01,528 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:01,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:01,589 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:01,589 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:01,589 INFO L207 CegarAbsIntRunner]: [0], [22], [36], [37] [2019-02-15 11:28:01,590 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:01,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:01,755 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:01,756 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. [2019-02-15 11:28:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:01,756 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:01,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:01,756 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:28:01,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:01,767 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:01,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:01,777 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-15 11:28:01,785 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 [2019-02-15 11:28:01,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,797 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 [2019-02-15 11:28:01,807 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,809 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:28:01,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,826 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,827 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:01,831 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,833 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:01,846 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,852 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,854 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,857 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:01,862 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 [2019-02-15 11:28:01,874 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:01,875 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:01,935 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:01,993 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,025 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,051 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,074 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,092 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,109 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,147 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 [2019-02-15 11:28:02,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,167 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:28:02,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,217 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:02,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,282 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,283 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 [2019-02-15 11:28:02,351 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,353 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,358 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,360 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,361 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 [2019-02-15 11:28:02,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,453 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,454 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,455 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,456 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,457 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,458 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,461 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,462 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 [2019-02-15 11:28:02,462 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,502 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,542 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,580 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,620 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,663 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,733 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. [2019-02-15 11:28:02,733 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 11:28:02,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:02,769 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 [2019-02-15 11:28:02,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:02,836 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. [2019-02-15 11:28:02,836 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-15 11:28:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:02,856 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:02,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:02,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:28:02,888 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:02,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:28:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:28:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:28:02,888 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 6 states. [2019-02-15 11:28:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:03,213 INFO L93 Difference]: Finished difference Result 108 states and 483 transitions. [2019-02-15 11:28:03,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:28:03,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 11:28:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:03,215 INFO L225 Difference]: With dead ends: 108 [2019-02-15 11:28:03,215 INFO L226 Difference]: Without dead ends: 107 [2019-02-15 11:28:03,215 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 [2019-02-15 11:28:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-02-15 11:28:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2019-02-15 11:28:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-02-15 11:28:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 448 transitions. [2019-02-15 11:28:03,232 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 448 transitions. Word has length 4 [2019-02-15 11:28:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:03,233 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 448 transitions. [2019-02-15 11:28:03,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:28:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 448 transitions. [2019-02-15 11:28:03,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:03,233 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:03,234 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:03,234 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash 945008, now seen corresponding path program 1 times [2019-02-15 11:28:03,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:03,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:03,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:03,235 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:03,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:03,372 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:03,372 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:03,373 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [35] [2019-02-15 11:28:03,374 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:03,374 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:03,617 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:03,617 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. [2019-02-15 11:28:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:03,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:03,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:03,618 INFO 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 [2019-02-15 11:28:03,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:03,627 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:03,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:03,695 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:03,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,743 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 [2019-02-15 11:28:03,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,796 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,798 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 [2019-02-15 11:28:03,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,859 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,860 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,863 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,863 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 [2019-02-15 11:28:03,937 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,939 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,940 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,941 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,942 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,944 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,945 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,946 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:03,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:04,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,050 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,054 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 [2019-02-15 11:28:04,054 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,096 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,138 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,190 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,235 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,280 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,334 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 [2019-02-15 11:28:04,338 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 [2019-02-15 11:28:04,341 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 [2019-02-15 11:28:04,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:28:04,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:04,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:04,354 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 [2019-02-15 11:28:04,366 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 [2019-02-15 11:28:04,367 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,424 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,467 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,498 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,525 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,545 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,583 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,601 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,672 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. [2019-02-15 11:28:04,672 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:28:04,721 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:04,722 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,790 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. [2019-02-15 11:28:04,791 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:28:04,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,918 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,919 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,920 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,921 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,922 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:04,923 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 [2019-02-15 11:28:04,923 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:04,996 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. [2019-02-15 11:28:04,997 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-15 11:28:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:05,020 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:05,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:05,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 11:28:05,068 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:05,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:28:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:28:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-02-15 11:28:05,069 INFO L87 Difference]: Start difference. First operand 80 states and 448 transitions. Second operand 8 states. [2019-02-15 11:28:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:07,029 INFO L93 Difference]: Finished difference Result 154 states and 652 transitions. [2019-02-15 11:28:07,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 11:28:07,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:28:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:07,035 INFO L225 Difference]: With dead ends: 154 [2019-02-15 11:28:07,035 INFO L226 Difference]: Without dead ends: 153 [2019-02-15 11:28:07,035 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-02-15 11:28:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-02-15 11:28:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 92. [2019-02-15 11:28:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-02-15 11:28:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 556 transitions. [2019-02-15 11:28:07,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 556 transitions. Word has length 4 [2019-02-15 11:28:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:07,058 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 556 transitions. [2019-02-15 11:28:07,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:28:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 556 transitions. [2019-02-15 11:28:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:07,059 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:07,059 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:07,059 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:07,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:07,059 INFO L82 PathProgramCache]: Analyzing trace with hash 945504, now seen corresponding path program 1 times [2019-02-15 11:28:07,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:07,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:07,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:07,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:07,064 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:07,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:07,224 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:07,224 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:07,224 INFO L207 CegarAbsIntRunner]: [0], [22], [26], [35] [2019-02-15 11:28:07,228 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:07,228 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:07,471 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:07,471 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. [2019-02-15 11:28:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:07,471 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:07,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:07,472 INFO 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 [2019-02-15 11:28:07,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:07,479 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:07,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:07,527 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 [2019-02-15 11:28:07,531 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 [2019-02-15 11:28:07,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,540 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2019-02-15 11:28:07,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:28:07,560 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,565 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 [2019-02-15 11:28:07,569 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,570 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,571 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,572 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,574 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,575 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 [2019-02-15 11:28:07,580 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,582 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,584 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,585 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,587 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,601 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 [2019-02-15 11:28:07,613 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 [2019-02-15 11:28:07,614 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,673 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,720 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,756 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,785 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,809 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,827 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,844 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:07,890 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:28:07,934 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,936 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,937 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 [2019-02-15 11:28:07,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,989 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,991 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:07,992 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 [2019-02-15 11:28:08,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,055 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,056 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,057 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,058 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 [2019-02-15 11:28:08,134 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,135 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,136 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,137 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,138 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,140 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,141 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,142 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,143 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 105 [2019-02-15 11:28:08,240 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,241 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,242 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,243 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,245 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,246 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,247 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,251 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 [2019-02-15 11:28:08,252 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,293 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,335 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,377 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,419 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,461 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,535 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. [2019-02-15 11:28:08,536 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:28:08,581 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,582 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 [2019-02-15 11:28:08,582 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,650 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. [2019-02-15 11:28:08,650 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:28:08,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,682 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:08,687 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 [2019-02-15 11:28:08,687 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:08,760 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. [2019-02-15 11:28:08,761 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-15 11:28:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:08,783 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:08,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:08,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 11:28:08,834 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:08,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:28:08,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:28:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 11:28:08,835 INFO L87 Difference]: Start difference. First operand 92 states and 556 transitions. Second operand 8 states. [2019-02-15 11:28:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:09,552 INFO L93 Difference]: Finished difference Result 148 states and 688 transitions. [2019-02-15 11:28:09,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-15 11:28:09,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:28:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:09,554 INFO L225 Difference]: With dead ends: 148 [2019-02-15 11:28:09,555 INFO L226 Difference]: Without dead ends: 146 [2019-02-15 11:28:09,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:28:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-02-15 11:28:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2019-02-15 11:28:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-02-15 11:28:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 590 transitions. [2019-02-15 11:28:09,576 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 590 transitions. Word has length 4 [2019-02-15 11:28:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:09,576 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 590 transitions. [2019-02-15 11:28:09,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:28:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 590 transitions. [2019-02-15 11:28:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:09,577 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:09,577 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:09,577 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 933972, now seen corresponding path program 1 times [2019-02-15 11:28:09,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:09,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:09,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:09,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:09,579 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:09,797 WARN L181 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2019-02-15 11:28:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:09,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:09,821 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:09,822 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:09,822 INFO L207 CegarAbsIntRunner]: [0], [10], [26], [35] [2019-02-15 11:28:09,823 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:09,823 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:10,075 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:10,075 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. [2019-02-15 11:28:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:10,075 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:10,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:10,075 INFO 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 [2019-02-15 11:28:10,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:10,084 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:10,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:10,150 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 [2019-02-15 11:28:10,154 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 [2019-02-15 11:28:10,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,163 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 [2019-02-15 11:28:10,167 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,168 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,170 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,171 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 [2019-02-15 11:28:10,182 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,183 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,184 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,186 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,187 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 [2019-02-15 11:28:10,194 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,195 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,196 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,197 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:10,203 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,204 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,206 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,210 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,212 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,213 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 [2019-02-15 11:28:10,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:10,229 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,293 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,342 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,381 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,410 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,435 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,455 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,472 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,519 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:10,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,567 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 [2019-02-15 11:28:10,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,616 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,618 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,619 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 [2019-02-15 11:28:10,680 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,681 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,683 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,684 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,685 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,687 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 [2019-02-15 11:28:10,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,765 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,768 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,769 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,770 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,771 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,772 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:10,869 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,879 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,880 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:10,881 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 [2019-02-15 11:28:10,881 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,921 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:10,963 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:11,004 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:11,047 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:11,089 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:11,163 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. [2019-02-15 11:28:11,164 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:28:11,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,215 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:11,215 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:11,283 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. [2019-02-15 11:28:11,283 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:28:11,311 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,313 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,315 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,318 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,319 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,320 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:11,321 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:11,322 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 [2019-02-15 11:28:11,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:11,393 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. [2019-02-15 11:28:11,393 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:108, output treesize:82 [2019-02-15 11:28:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:11,413 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:11,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:11,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2019-02-15 11:28:11,458 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:11,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:28:11,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:28:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-02-15 11:28:11,458 INFO L87 Difference]: Start difference. First operand 103 states and 590 transitions. Second operand 8 states. [2019-02-15 11:28:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:12,008 INFO L93 Difference]: Finished difference Result 145 states and 646 transitions. [2019-02-15 11:28:12,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-02-15 11:28:12,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:28:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:12,011 INFO L225 Difference]: With dead ends: 145 [2019-02-15 11:28:12,011 INFO L226 Difference]: Without dead ends: 143 [2019-02-15 11:28:12,012 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 [2019-02-15 11:28:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-02-15 11:28:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2019-02-15 11:28:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-15 11:28:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 599 transitions. [2019-02-15 11:28:12,030 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 599 transitions. Word has length 4 [2019-02-15 11:28:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:12,031 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 599 transitions. [2019-02-15 11:28:12,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:28:12,031 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 599 transitions. [2019-02-15 11:28:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:12,031 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:12,032 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:12,032 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 938128, now seen corresponding path program 1 times [2019-02-15 11:28:12,032 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:12,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:12,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:12,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:12,033 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:12,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:12,099 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:12,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:12,100 INFO L207 CegarAbsIntRunner]: [0], [14], [36], [37] [2019-02-15 11:28:12,101 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:12,101 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:12,278 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:12,279 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. [2019-02-15 11:28:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:12,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:12,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:12,279 INFO 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 [2019-02-15 11:28:12,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:12,288 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:12,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:12,301 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 [2019-02-15 11:28:12,304 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 [2019-02-15 11:28:12,314 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,316 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,316 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 [2019-02-15 11:28:12,324 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,326 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,328 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,328 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 [2019-02-15 11:28:12,334 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,338 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,341 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,343 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,343 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 [2019-02-15 11:28:12,347 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,349 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,352 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,354 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,356 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,357 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:12,362 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,364 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,366 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,376 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,376 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 [2019-02-15 11:28:12,392 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 [2019-02-15 11:28:12,393 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,452 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,499 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,535 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,564 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,587 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,607 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,626 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:12,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2019-02-15 11:28:12,686 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,689 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,690 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 [2019-02-15 11:28:12,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,734 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,735 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:12,793 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,794 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,795 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,797 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,798 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,800 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,801 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 [2019-02-15 11:28:12,871 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,874 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,881 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:12,971 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,975 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,976 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,977 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,978 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,979 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,981 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:12,984 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 [2019-02-15 11:28:12,984 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,022 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,061 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,101 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,141 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,183 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,254 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. [2019-02-15 11:28:13,255 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 11:28:13,307 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:13,308 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:13,308 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:13,373 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. [2019-02-15 11:28:13,374 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-15 11:28:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:13,419 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:13,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:13,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:28:13,451 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:13,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:28:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:28:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:28:13,451 INFO L87 Difference]: Start difference. First operand 104 states and 599 transitions. Second operand 6 states. [2019-02-15 11:28:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:13,850 INFO L93 Difference]: Finished difference Result 124 states and 613 transitions. [2019-02-15 11:28:13,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:28:13,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 11:28:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:13,853 INFO L225 Difference]: With dead ends: 124 [2019-02-15 11:28:13,853 INFO L226 Difference]: Without dead ends: 123 [2019-02-15 11:28:13,854 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 [2019-02-15 11:28:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-02-15 11:28:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2019-02-15 11:28:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-02-15 11:28:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2019-02-15 11:28:13,878 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 4 [2019-02-15 11:28:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:13,878 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2019-02-15 11:28:13,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:28:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2019-02-15 11:28:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:13,879 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:13,879 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:13,879 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash 937816, now seen corresponding path program 1 times [2019-02-15 11:28:13,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:13,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:13,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:13,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:13,881 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:14,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:14,034 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:14,034 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:14,034 INFO L207 CegarAbsIntRunner]: [0], [14], [26], [35] [2019-02-15 11:28:14,035 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:14,035 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:14,302 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:14,302 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. [2019-02-15 11:28:14,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:14,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:14,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:14,303 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 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 [2019-02-15 11:28:14,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:14,311 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:14,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:14,349 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 [2019-02-15 11:28:14,353 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 [2019-02-15 11:28:14,357 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,359 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 [2019-02-15 11:28:14,368 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,370 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,372 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 60 [2019-02-15 11:28:14,381 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,382 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,384 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,386 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,387 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 [2019-02-15 11:28:14,391 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,393 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,395 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,396 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,398 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,399 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:14,407 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,408 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,409 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,411 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,413 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,414 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,416 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 [2019-02-15 11:28:14,429 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:14,430 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,493 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,542 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,577 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,608 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,629 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,649 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,667 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:14,710 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,711 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select 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 [2019-02-15 11:28:14,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,760 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,760 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 [2019-02-15 11:28:14,810 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,811 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,812 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,813 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:14,872 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,873 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,875 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,876 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,877 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,878 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,879 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 [2019-02-15 11:28:14,955 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,956 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,957 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:14,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:15,059 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,060 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,062 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,063 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,064 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,065 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,066 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,068 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,071 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 [2019-02-15 11:28:15,071 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,111 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,152 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,191 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,234 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,276 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,349 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. [2019-02-15 11:28:15,349 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:28:15,462 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,463 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 [2019-02-15 11:28:15,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,531 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. [2019-02-15 11:28:15,531 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:96 [2019-02-15 11:28:15,561 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,562 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,563 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,564 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,565 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,566 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,597 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,619 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,642 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:15,644 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 [2019-02-15 11:28:15,645 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:15,797 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. [2019-02-15 11:28:15,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:106, output treesize:76 [2019-02-15 11:28:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:15,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:15,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:15,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2019-02-15 11:28:15,865 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:15,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-02-15 11:28:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-02-15 11:28:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-02-15 11:28:15,866 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 8 states. [2019-02-15 11:28:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:16,773 INFO L93 Difference]: Finished difference Result 176 states and 800 transitions. [2019-02-15 11:28:16,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 11:28:16,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2019-02-15 11:28:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:16,776 INFO L225 Difference]: With dead ends: 176 [2019-02-15 11:28:16,776 INFO L226 Difference]: Without dead ends: 174 [2019-02-15 11:28:16,777 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-02-15 11:28:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-02-15 11:28:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2019-02-15 11:28:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-15 11:28:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-15 11:28:16,810 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-15 11:28:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:16,811 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-15 11:28:16,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-02-15 11:28:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-15 11:28:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-02-15 11:28:16,811 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:16,811 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-02-15 11:28:16,811 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 953504, now seen corresponding path program 1 times [2019-02-15 11:28:16,812 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:16,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:16,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:16,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:16,813 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:16,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:16,992 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:16,992 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2019-02-15 11:28:16,993 INFO L207 CegarAbsIntRunner]: [0], [30], [36], [37] [2019-02-15 11:28:16,994 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:16,994 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:17,399 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:17,399 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. [2019-02-15 11:28:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:17,400 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:17,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:17,400 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 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 [2019-02-15 11:28:17,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:17,415 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:17,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:17,455 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 [2019-02-15 11:28:17,555 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,556 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,557 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 [2019-02-15 11:28:17,600 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,601 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,604 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,605 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,606 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:17,659 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,660 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,661 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,662 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,663 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,665 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,666 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 [2019-02-15 11:28:17,737 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,738 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,739 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,740 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,741 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,742 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,743 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,746 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:17,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,838 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,843 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,845 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,848 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:17,848 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 [2019-02-15 11:28:17,849 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:17,887 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:17,926 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:17,968 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,010 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,053 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,105 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 [2019-02-15 11:28:18,112 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 [2019-02-15 11:28:18,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:28:18,121 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 [2019-02-15 11:28:18,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:18,132 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:18,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:18,152 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 [2019-02-15 11:28:18,153 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,209 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,250 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,282 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,307 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,327 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,344 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,359 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,427 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. [2019-02-15 11:28:18,428 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:113, output treesize:121 [2019-02-15 11:28:18,466 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:18,467 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 [2019-02-15 11:28:18,468 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:18,533 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. [2019-02-15 11:28:18,533 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:126, output treesize:92 [2019-02-15 11:28:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:18,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:18,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:18,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2019-02-15 11:28:18,612 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:18,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-02-15 11:28:18,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-02-15 11:28:18,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-02-15 11:28:18,613 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 6 states. [2019-02-15 11:28:18,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:18,918 INFO L93 Difference]: Finished difference Result 135 states and 696 transitions. [2019-02-15 11:28:18,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-02-15 11:28:18,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2019-02-15 11:28:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:18,921 INFO L225 Difference]: With dead ends: 135 [2019-02-15 11:28:18,921 INFO L226 Difference]: Without dead ends: 134 [2019-02-15 11:28:18,922 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 [2019-02-15 11:28:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-02-15 11:28:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2019-02-15 11:28:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-02-15 11:28:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 670 transitions. [2019-02-15 11:28:18,957 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 670 transitions. Word has length 4 [2019-02-15 11:28:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:18,957 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 670 transitions. [2019-02-15 11:28:18,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-02-15 11:28:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 670 transitions. [2019-02-15 11:28:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 11:28:18,958 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:18,958 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 11:28:18,959 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash 29600478, now seen corresponding path program 1 times [2019-02-15 11:28:18,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:18,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:18,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:18,960 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:19,265 WARN L181 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2019-02-15 11:28:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:19,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:19,363 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:19,363 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 11:28:19,364 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [32], [35] [2019-02-15 11:28:19,365 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:19,365 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:20,054 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:20,055 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. [2019-02-15 11:28:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:20,055 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:20,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:20,055 INFO 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 [2019-02-15 11:28:20,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:20,065 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:20,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:20,198 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-02-15 11:28:20,201 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 [2019-02-15 11:28:20,204 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 [2019-02-15 11:28:20,208 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,209 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,209 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 [2019-02-15 11:28:20,214 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,215 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,216 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:28:20,221 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,222 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,223 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,224 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:20,229 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,230 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,231 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,233 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,234 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,235 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 [2019-02-15 11:28:20,248 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,249 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,250 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,252 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,253 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,254 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,256 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:20,261 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,262 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,263 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,264 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,265 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,266 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,268 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,269 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:20,270 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,356 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,407 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,445 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,476 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,502 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,522 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,539 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:20,592 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,592 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:20,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,648 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,649 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 [2019-02-15 11:28:20,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,712 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,713 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,715 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,715 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 [2019-02-15 11:28:20,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,786 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,787 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,788 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,789 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,790 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,791 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 [2019-02-15 11:28:20,883 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,884 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,885 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,886 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,887 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,888 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,889 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,891 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:20,892 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 [2019-02-15 11:28:20,998 WARN L181 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-02-15 11:28:21,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,004 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,006 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,008 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,010 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,013 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,015 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 134 [2019-02-15 11:28:21,145 WARN L181 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:28:21,150 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,152 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,153 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,154 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,155 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,156 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,158 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,159 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,160 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,161 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,162 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,164 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,165 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 [2019-02-15 11:28:21,165 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,225 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,285 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,343 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,405 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,465 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,529 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,627 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-02-15 11:28:21,627 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-15 11:28:21,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,673 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 [2019-02-15 11:28:21,674 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,774 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. [2019-02-15 11:28:21,774 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-15 11:28:21,815 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,816 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,818 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,819 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,820 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,822 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,823 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,824 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,825 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,826 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:21,827 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 [2019-02-15 11:28:21,828 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:21,925 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-02-15 11:28:21,926 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-15 11:28:21,959 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,960 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,961 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,962 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,963 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,965 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,967 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,968 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,969 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,970 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,972 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,973 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,974 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:21,975 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 [2019-02-15 11:28:21,976 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:22,074 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. [2019-02-15 11:28:22,075 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:89 [2019-02-15 11:28:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:22,117 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:22,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:22,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2019-02-15 11:28:22,176 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:22,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 11:28:22,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 11:28:22,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-02-15 11:28:22,177 INFO L87 Difference]: Start difference. First operand 108 states and 670 transitions. Second operand 10 states. [2019-02-15 11:28:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:23,262 INFO L93 Difference]: Finished difference Result 212 states and 968 transitions. [2019-02-15 11:28:23,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-02-15 11:28:23,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 11:28:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:23,266 INFO L225 Difference]: With dead ends: 212 [2019-02-15 11:28:23,266 INFO L226 Difference]: Without dead ends: 205 [2019-02-15 11:28:23,267 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-15 11:28:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-02-15 11:28:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 122. [2019-02-15 11:28:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-02-15 11:28:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 789 transitions. [2019-02-15 11:28:23,302 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 789 transitions. Word has length 5 [2019-02-15 11:28:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:23,302 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 789 transitions. [2019-02-15 11:28:23,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 11:28:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 789 transitions. [2019-02-15 11:28:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 11:28:23,303 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:23,304 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 11:28:23,304 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash 29600106, now seen corresponding path program 1 times [2019-02-15 11:28:23,304 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:23,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:23,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:23,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:23,305 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:23,598 WARN L181 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2019-02-15 11:28:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:23,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:23,630 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:23,630 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 11:28:23,630 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [32], [35] [2019-02-15 11:28:23,631 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:23,631 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:24,355 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:24,355 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. [2019-02-15 11:28:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:24,356 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:24,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:24,356 INFO 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 [2019-02-15 11:28:24,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:24,364 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:24,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:24,410 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 11:28:24,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,476 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 [2019-02-15 11:28:24,533 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,537 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,539 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,542 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,543 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 [2019-02-15 11:28:24,611 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,613 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,615 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,617 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,620 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,622 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,623 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:24,711 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,714 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,717 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,720 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,723 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,728 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,730 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,732 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 11:28:24,841 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,844 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,847 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,849 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,851 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,853 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,856 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,858 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,861 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,864 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:24,864 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 [2019-02-15 11:28:24,991 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:28:25,003 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,005 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,007 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,009 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,011 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,012 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,014 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,017 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,019 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,022 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,024 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,026 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,027 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 [2019-02-15 11:28:25,027 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,095 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,166 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,243 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,320 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,393 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,468 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,558 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 [2019-02-15 11:28:25,561 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 [2019-02-15 11:28:25,565 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 [2019-02-15 11:28:25,567 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 [2019-02-15 11:28:25,570 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 [2019-02-15 11:28:25,575 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 [2019-02-15 11:28:25,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:25,584 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:25,585 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,661 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,702 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,737 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,763 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,785 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,804 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,821 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:25,927 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. [2019-02-15 11:28:25,928 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-15 11:28:25,966 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:25,967 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 [2019-02-15 11:28:25,968 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:26,067 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. [2019-02-15 11:28:26,068 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-15 11:28:26,110 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,111 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,112 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,113 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,114 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,115 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,117 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,118 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,119 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,119 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:26,120 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 [2019-02-15 11:28:26,121 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:26,221 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. [2019-02-15 11:28:26,222 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-15 11:28:26,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,292 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,293 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,294 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,296 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,297 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,298 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,299 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:26,300 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:26,301 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 [2019-02-15 11:28:26,302 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:26,400 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. [2019-02-15 11:28:26,401 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-15 11:28:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:26,433 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:26,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:26,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-15 11:28:26,493 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:26,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 11:28:26,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 11:28:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-15 11:28:26,494 INFO L87 Difference]: Start difference. First operand 122 states and 789 transitions. Second operand 10 states. [2019-02-15 11:28:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:28,450 INFO L93 Difference]: Finished difference Result 169 states and 850 transitions. [2019-02-15 11:28:28,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-02-15 11:28:28,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 11:28:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:28,453 INFO L225 Difference]: With dead ends: 169 [2019-02-15 11:28:28,454 INFO L226 Difference]: Without dead ends: 168 [2019-02-15 11:28:28,454 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2019-02-15 11:28:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-02-15 11:28:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2019-02-15 11:28:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-02-15 11:28:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 762 transitions. [2019-02-15 11:28:28,488 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 762 transitions. Word has length 5 [2019-02-15 11:28:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:28,488 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 762 transitions. [2019-02-15 11:28:28,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 11:28:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 762 transitions. [2019-02-15 11:28:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 11:28:28,489 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:28,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 11:28:28,489 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash 29600602, now seen corresponding path program 1 times [2019-02-15 11:28:28,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:28,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:28,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:28,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:28,491 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:28,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:28,602 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:28,603 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 11:28:28,603 INFO L207 CegarAbsIntRunner]: [0], [18], [26], [32], [35] [2019-02-15 11:28:28,605 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:28,606 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:29,297 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:29,298 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. [2019-02-15 11:28:29,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:29,298 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:29,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:29,298 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-02-15 11:28:29,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:29,307 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:29,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:29,359 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 114 [2019-02-15 11:28:29,415 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,416 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,417 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 104 [2019-02-15 11:28:29,474 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,475 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,476 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,477 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 [2019-02-15 11:28:29,545 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,546 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,547 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,548 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,549 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,551 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,551 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 [2019-02-15 11:28:29,643 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,645 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,646 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,647 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,649 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,650 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,651 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,652 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 116 [2019-02-15 11:28:29,756 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,757 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,759 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,761 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,762 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,763 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,764 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,766 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,767 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,768 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 [2019-02-15 11:28:29,896 WARN L181 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2019-02-15 11:28:29,900 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,903 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,910 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,912 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:29,914 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 [2019-02-15 11:28:29,915 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:29,974 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,036 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,100 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,163 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,229 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,293 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2019-02-15 11:28:30,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:30,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2019-02-15 11:28:30,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2019-02-15 11:28:30,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:30,387 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 [2019-02-15 11:28:30,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:30,395 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 [2019-02-15 11:28:30,396 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,474 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,517 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,549 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,576 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,598 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,615 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,632 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,731 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. [2019-02-15 11:28:30,731 INFO L202 ElimStorePlain]: Needed 16 recursive calls to eliminate 6 variables, input treesize:147, output treesize:153 [2019-02-15 11:28:30,774 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,775 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 [2019-02-15 11:28:30,775 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:30,872 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. [2019-02-15 11:28:30,873 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:163, output treesize:125 [2019-02-15 11:28:30,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,908 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,909 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,911 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,912 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,913 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,914 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,915 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,916 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:30,917 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:30,918 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 [2019-02-15 11:28:30,919 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:31,016 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. [2019-02-15 11:28:31,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:137, output treesize:105 [2019-02-15 11:28:31,069 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,070 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,071 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,073 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,074 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,075 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,077 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,078 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,079 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,080 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,082 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,083 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,084 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:31,085 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:31,086 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 [2019-02-15 11:28:31,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:31,186 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. [2019-02-15 11:28:31,186 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:119, output treesize:95 [2019-02-15 11:28:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:31,255 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:31,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:31,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2019-02-15 11:28:31,316 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:31,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 11:28:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 11:28:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-02-15 11:28:31,316 INFO L87 Difference]: Start difference. First operand 119 states and 762 transitions. Second operand 10 states. [2019-02-15 11:28:34,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-02-15 11:28:34,748 INFO L93 Difference]: Finished difference Result 176 states and 845 transitions. [2019-02-15 11:28:34,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-02-15 11:28:34,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2019-02-15 11:28:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-02-15 11:28:34,751 INFO L225 Difference]: With dead ends: 176 [2019-02-15 11:28:34,752 INFO L226 Difference]: Without dead ends: 172 [2019-02-15 11:28:34,752 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-02-15 11:28:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-02-15 11:28:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 125. [2019-02-15 11:28:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-02-15 11:28:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 788 transitions. [2019-02-15 11:28:34,780 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 788 transitions. Word has length 5 [2019-02-15 11:28:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-02-15 11:28:34,781 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 788 transitions. [2019-02-15 11:28:34,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-02-15 11:28:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 788 transitions. [2019-02-15 11:28:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-02-15 11:28:34,782 INFO L394 BasicCegarLoop]: Found error trace [2019-02-15 11:28:34,782 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-02-15 11:28:34,782 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr5ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr7ASSERT_VIOLATIONASSERT, ULTIMATE.startErr6ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT]=== [2019-02-15 11:28:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash 29588822, now seen corresponding path program 1 times [2019-02-15 11:28:34,783 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-02-15 11:28:34,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:34,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:34,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-02-15 11:28:34,784 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-02-15 11:28:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:34,946 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2019-02-15 11:28:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:34,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:34,993 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-02-15 11:28:34,994 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2019-02-15 11:28:34,994 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [32], [35] [2019-02-15 11:28:34,995 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2019-02-15 11:28:34,995 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2019-02-15 11:28:35,686 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-02-15 11:28:35,686 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. [2019-02-15 11:28:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-02-15 11:28:35,686 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-02-15 11:28:35,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-02-15 11:28:35,687 INFO 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 [2019-02-15 11:28:35,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-02-15 11:28:35,694 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-02-15 11:28:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-02-15 11:28:35,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-02-15 11:28:35,733 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,734 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2019-02-15 11:28:35,784 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,785 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,786 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 [2019-02-15 11:28:35,836 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,837 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,839 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,840 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,841 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:35,901 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,902 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,904 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,905 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,906 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,907 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,908 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 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 [2019-02-15 11:28:35,982 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,983 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,985 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,986 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,987 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,988 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,990 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:35,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:36,085 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,087 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,088 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,089 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,091 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,092 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,093 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,094 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,096 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,097 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,098 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 [2019-02-15 11:28:36,098 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,142 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,184 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,228 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,272 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,317 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,368 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 [2019-02-15 11:28:36,394 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 [2019-02-15 11:28:36,398 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 [2019-02-15 11:28:36,401 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 [2019-02-15 11:28:36,404 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 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 [2019-02-15 11:28:36,408 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 [2019-02-15 11:28:36,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 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 [2019-02-15 11:28:36,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:36,422 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,476 INFO L267 ElimStorePlain]: Start of recursive call 14: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,519 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,554 INFO L267 ElimStorePlain]: Start of recursive call 12: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,579 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,601 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,618 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,635 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-02-15 11:28:36,709 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. [2019-02-15 11:28:36,709 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:121, output treesize:125 [2019-02-15 11:28:36,758 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:36,818 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 [2019-02-15 11:28:36,819 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-02-15 11:28:36,856 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 128 xjuncts. [2019-02-15 11:28:38,381 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. [2019-02-15 11:28:38,382 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:135, output treesize:950 [2019-02-15 11:28:42,180 WARN L181 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 478 DAG size of output: 183 [2019-02-15 11:28:42,189 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,190 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,190 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:42,191 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 [2019-02-15 11:28:42,191 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:42,443 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,444 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,445 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,446 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,448 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,449 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,450 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,451 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,452 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 [2019-02-15 11:28:42,452 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:42,670 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,671 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,672 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,674 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,675 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,676 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,677 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,678 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,679 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:42,680 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 [2019-02-15 11:28:42,681 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:42,905 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. [2019-02-15 11:28:42,905 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 18 variables, input treesize:373, output treesize:277 [2019-02-15 11:28:43,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,039 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,040 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,042 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,043 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,044 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,045 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,046 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,047 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,048 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,049 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,051 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,052 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,053 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,054 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,054 INFO L683 Elim1Store]: detected equality via solver [2019-02-15 11:28:43,055 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 [2019-02-15 11:28:43,056 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:43,275 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,276 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,277 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,278 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,279 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,280 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,281 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,283 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,284 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,285 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,286 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,287 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,288 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,289 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,290 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,291 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:43,293 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:43,507 INFO L701 Elim1Store]: detected not equals via solver [2019-02-15 11:28:43,508 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 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 [2019-02-15 11:28:43,508 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-02-15 11:28:43,686 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. [2019-02-15 11:28:43,687 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 21 variables, input treesize:307, output treesize:237 [2019-02-15 11:28:43,927 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2019-02-15 11:28:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:43,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2019-02-15 11:28:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-02-15 11:28:43,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-02-15 11:28:43,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2019-02-15 11:28:43,975 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-02-15 11:28:43,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-02-15 11:28:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-02-15 11:28:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-02-15 11:28:43,976 INFO L87 Difference]: Start difference. First operand 125 states and 788 transitions. Second operand 10 states. [2019-02-15 11:28:44,566 WARN L181 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 127 [2019-02-15 11:28:53,216 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-02-15 11:28:53,218 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) 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 [2019-02-15 11:28:53,222 INFO L168 Benchmark]: Toolchain (without parser) took 161751.68 ms. Allocated memory was 137.9 MB in the beginning and 683.7 MB in the end (delta: 545.8 MB). Free memory was 105.2 MB in the beginning and 135.8 MB in the end (delta: -30.5 MB). Peak memory consumption was 515.2 MB. Max. memory is 7.1 GB. [2019-02-15 11:28:53,222 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory is still 106.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-02-15 11:28:53,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.34 ms. Allocated memory is still 137.9 MB. Free memory was 105.2 MB in the beginning and 102.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-02-15 11:28:53,223 INFO L168 Benchmark]: Boogie Preprocessor took 38.60 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 101.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-02-15 11:28:53,223 INFO L168 Benchmark]: RCFGBuilder took 512.33 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 88.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-02-15 11:28:53,224 INFO L168 Benchmark]: TraceAbstraction took 161124.58 ms. Allocated memory was 137.9 MB in the beginning and 683.7 MB in the end (delta: 545.8 MB). Free memory was 88.2 MB in the beginning and 135.8 MB in the end (delta: -47.6 MB). Peak memory consumption was 498.2 MB. Max. memory is 7.1 GB. [2019-02-15 11:28:53,226 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 0.21 ms. Allocated memory is still 137.9 MB. Free memory is still 106.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 71.34 ms. Allocated memory is still 137.9 MB. Free memory was 105.2 MB in the beginning and 102.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.60 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 101.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 512.33 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 88.6 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 161124.58 ms. Allocated memory was 137.9 MB in the beginning and 683.7 MB in the end (delta: 545.8 MB). Free memory was 88.2 MB in the beginning and 135.8 MB in the end (delta: -47.6 MB). Peak memory consumption was 498.2 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...