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-6-unlimited.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-e1a14da [2018-12-24 14:29:25,980 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-24 14:29:25,983 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-24 14:29:25,996 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-12-24 14:29:26,030 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 [2018-12-24 14:29:26,049 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-24 14:29:26,050 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-24 14:29:26,051 INFO L131 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2018-12-24 14:29:26,051 INFO L133 SettingsManager]: * Show backtranslation warnings=false [2018-12-24 14:29:26,051 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-24 14:29:26,051 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-24 14:29:26,051 INFO L133 SettingsManager]: * Inline calls to unimplemented procedures=true [2018-12-24 14:29:26,052 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-24 14:29:26,052 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-24 14:29:26,052 INFO L133 SettingsManager]: * Underlying domain=OctagonDomain [2018-12-24 14:29:26,052 INFO L133 SettingsManager]: * Abstract domain=ArrayDomain [2018-12-24 14:29:26,052 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-24 14:29:26,053 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-24 14:29:26,053 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-24 14:29:26,053 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-24 14:29:26,054 INFO L133 SettingsManager]: * Use SBE=true [2018-12-24 14:29:26,054 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-24 14:29:26,054 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-24 14:29:26,054 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-24 14:29:26,054 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-24 14:29:26,055 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-24 14:29:26,055 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-24 14:29:26,055 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-24 14:29:26,055 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-24 14:29:26,055 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-24 14:29:26,056 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-24 14:29:26,056 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-24 14:29:26,056 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-24 14:29:26,056 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-24 14:29:26,056 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-24 14:29:26,057 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-24 14:29:26,057 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-24 14:29:26,057 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-24 14:29:26,057 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-24 14:29:26,057 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-24 14:29:26,058 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-24 14:29:26,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-24 14:29:26,058 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-24 14:29:26,058 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-12-24 14:29:26,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-24 14:29:26,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-24 14:29:26,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-24 14:29:26,107 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-12-24 14:29:26,107 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-12-24 14:29:26,108 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl [2018-12-24 14:29:26,109 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/heapseparator/speedup-poc-dd-6-unlimited.bpl' [2018-12-24 14:29:26,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-24 14:29:26,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-12-24 14:29:26,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-24 14:29:26,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-24 14:29:26,156 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-24 14:29:26,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-24 14:29:26,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-24 14:29:26,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-24 14:29:26,217 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-24 14:29:26,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/1) ... [2018-12-24 14:29:26,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-24 14:29:26,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-24 14:29:26,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-24 14:29:26,244 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-24 14:29:26,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (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 [2018-12-24 14:29:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-24 14:29:26,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-24 14:29:26,753 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-24 14:29:26,753 INFO L280 CfgBuilder]: Removed 15 assue(true) statements. [2018-12-24 14:29:26,754 INFO L202 PluginConnector]: Adding new model speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:29:26 BoogieIcfgContainer [2018-12-24 14:29:26,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-24 14:29:26,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-24 14:29:26,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-24 14:29:26,759 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-24 14:29:26,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.12 02:29:26" (1/2) ... [2018-12-24 14:29:26,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3a1ae8 and model type speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 02:29:26, skipping insertion in model container [2018-12-24 14:29:26,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "speedup-poc-dd-6-unlimited.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 02:29:26" (2/2) ... [2018-12-24 14:29:26,764 INFO L112 eAbstractionObserver]: Analyzing ICFG speedup-poc-dd-6-unlimited.bpl [2018-12-24 14:29:26,776 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-24 14:29:26,785 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2018-12-24 14:29:26,813 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2018-12-24 14:29:26,868 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-24 14:29:26,868 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-24 14:29:26,868 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-24 14:29:26,868 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-24 14:29:26,869 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-24 14:29:26,869 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-24 14:29:26,869 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-24 14:29:26,869 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-24 14:29:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-24 14:29:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-12-24 14:29:26,890 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:26,891 INFO L402 BasicCegarLoop]: trace histogram [1, 1] [2018-12-24 14:29:26,893 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2018-12-24 14:29:26,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:26,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:26,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:26,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:26,950 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:27,112 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:29:27,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-24 14:29:27,114 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:29:27,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-24 14:29:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-24 14:29:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-24 14:29:27,135 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2018-12-24 14:29:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:27,410 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2018-12-24 14:29:27,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-24 14:29:27,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-12-24 14:29:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:27,427 INFO L225 Difference]: With dead ends: 29 [2018-12-24 14:29:27,428 INFO L226 Difference]: Without dead ends: 24 [2018-12-24 14:29:27,431 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 [2018-12-24 14:29:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-24 14:29:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2018-12-24 14:29:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-24 14:29:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 25 transitions. [2018-12-24 14:29:27,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 25 transitions. Word has length 2 [2018-12-24 14:29:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:27,469 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 25 transitions. [2018-12-24 14:29:27,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-24 14:29:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 25 transitions. [2018-12-24 14:29:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:27,470 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:27,470 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:27,470 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:27,471 INFO L82 PathProgramCache]: Analyzing trace with hash 30376, now seen corresponding path program 1 times [2018-12-24 14:29:27,471 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:27,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:27,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:27,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:27,473 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:27,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:27,591 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:27,593 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:29:27,595 INFO L207 CegarAbsIntRunner]: [0], [18], [27] [2018-12-24 14:29:27,650 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:27,650 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:28,844 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:28,845 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. [2018-12-24 14:29:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:28,852 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:28,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:28,853 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 [2018-12-24 14:29:28,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:28,867 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:28,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:29,159 WARN L181 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:29:29,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,206 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:29:29,511 WARN L181 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-12-24 14:29:29,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,537 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 41 treesize of output 53 [2018-12-24 14:29:29,716 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-12-24 14:29:29,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:29,757 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:29:29,973 WARN L181 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-12-24 14:29:30,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:30,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:30,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:30,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:30,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:30,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:30,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:30,068 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,115 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,138 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,166 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:29:30,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:30,260 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:30,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:30,304 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:29:30,440 INFO L303 Elim1Store]: Index analysis took 127 ms [2018-12-24 14:29:30,441 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:30,443 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,533 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,696 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,897 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,911 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,925 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:30,981 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. [2018-12-24 14:29:30,982 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:31,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:31,086 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:29:31,087 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:31,125 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:31,126 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:31,207 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:31,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:31,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:29:31,267 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:31,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:29:31,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:29:31,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:29:31,269 INFO L87 Difference]: Start difference. First operand 14 states and 25 transitions. Second operand 6 states. [2018-12-24 14:29:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:31,687 INFO L93 Difference]: Finished difference Result 47 states and 68 transitions. [2018-12-24 14:29:31,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:29:31,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:29:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:31,690 INFO L225 Difference]: With dead ends: 47 [2018-12-24 14:29:31,690 INFO L226 Difference]: Without dead ends: 45 [2018-12-24 14:29:31,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:29:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-24 14:29:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 18. [2018-12-24 14:29:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-24 14:29:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 37 transitions. [2018-12-24 14:29:31,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 37 transitions. Word has length 3 [2018-12-24 14:29:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:31,698 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 37 transitions. [2018-12-24 14:29:31,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:29:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 37 transitions. [2018-12-24 14:29:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:31,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:31,699 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:31,699 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash 30004, now seen corresponding path program 1 times [2018-12-24 14:29:31,700 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:31,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:31,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:31,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:31,701 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:31,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:31,790 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:31,791 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:29:31,791 INFO L207 CegarAbsIntRunner]: [0], [6], [27] [2018-12-24 14:29:31,796 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:31,796 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:32,285 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:32,286 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. [2018-12-24 14:29:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:32,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:32,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:32,287 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 [2018-12-24 14:29:32,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:32,304 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:32,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:32,510 WARN L181 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:29:32,522 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 21 treesize of output 24 [2018-12-24 14:29:32,539 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 24 treesize of output 30 [2018-12-24 14:29:32,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,606 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 26 treesize of output 40 [2018-12-24 14:29:32,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:32,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:32,796 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 30 treesize of output 72 [2018-12-24 14:29:32,933 INFO L303 Elim1Store]: Index analysis took 133 ms [2018-12-24 14:29:32,935 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:32,936 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:33,323 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:33,659 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:33,717 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:33,735 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:33,792 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:33,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:33,827 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 48 treesize of output 54 [2018-12-24 14:29:33,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:33,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:33,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:29:34,202 WARN L181 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-12-24 14:29:34,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,223 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 32 treesize of output 61 [2018-12-24 14:29:34,378 WARN L181 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-12-24 14:29:34,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:34,403 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:34,423 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:34,451 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:34,495 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:34,546 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. [2018-12-24 14:29:34,547 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:34,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:34,651 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:29:34,652 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:34,749 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:34,750 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:34,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:34,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:29:34,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:29:34,792 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:29:34,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:29:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:29:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:29:34,793 INFO L87 Difference]: Start difference. First operand 18 states and 37 transitions. Second operand 4 states. [2018-12-24 14:29:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:34,865 INFO L93 Difference]: Finished difference Result 23 states and 60 transitions. [2018-12-24 14:29:34,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:29:34,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-12-24 14:29:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:34,866 INFO L225 Difference]: With dead ends: 23 [2018-12-24 14:29:34,867 INFO L226 Difference]: Without dead ends: 22 [2018-12-24 14:29:34,867 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 [2018-12-24 14:29:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-24 14:29:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-12-24 14:29:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-24 14:29:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 59 transitions. [2018-12-24 14:29:34,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 59 transitions. Word has length 3 [2018-12-24 14:29:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:34,874 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 59 transitions. [2018-12-24 14:29:34,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:29:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 59 transitions. [2018-12-24 14:29:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:34,875 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:34,875 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:34,876 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash 30562, now seen corresponding path program 1 times [2018-12-24 14:29:34,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:34,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:34,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:34,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:34,878 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:35,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:35,072 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:35,073 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:29:35,073 INFO L207 CegarAbsIntRunner]: [0], [24], [27] [2018-12-24 14:29:35,075 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:35,075 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:38,136 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:38,136 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. [2018-12-24 14:29:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:38,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:38,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:38,138 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 [2018-12-24 14:29:38,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:38,156 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:38,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:38,287 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-12-24 14:29:38,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:29:38,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:29:38,474 WARN L181 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-12-24 14:29:38,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:29:38,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,561 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:29:38,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:38,670 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:29:38,671 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:38,700 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:38,729 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:38,755 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:38,802 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:38,894 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 21 treesize of output 24 [2018-12-24 14:29:38,902 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:38,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:38,916 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:38,923 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:29:38,928 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:29:38,929 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:38,989 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:39,010 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:39,028 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:39,181 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:39,198 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:39,266 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. [2018-12-24 14:29:39,267 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2018-12-24 14:29:39,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:39,427 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:29:39,428 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:39,479 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:39,480 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:101, output treesize:71 [2018-12-24 14:29:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:39,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:39,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:39,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:29:39,541 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:39,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:29:39,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:29:39,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:29:39,543 INFO L87 Difference]: Start difference. First operand 21 states and 59 transitions. Second operand 6 states. [2018-12-24 14:29:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:39,775 INFO L93 Difference]: Finished difference Result 39 states and 79 transitions. [2018-12-24 14:29:39,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:29:39,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:29:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:39,777 INFO L225 Difference]: With dead ends: 39 [2018-12-24 14:29:39,777 INFO L226 Difference]: Without dead ends: 36 [2018-12-24 14:29:39,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:29:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-24 14:29:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2018-12-24 14:29:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-24 14:29:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 67 transitions. [2018-12-24 14:29:39,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 67 transitions. Word has length 3 [2018-12-24 14:29:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:39,785 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 67 transitions. [2018-12-24 14:29:39,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:29:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 67 transitions. [2018-12-24 14:29:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-12-24 14:29:39,786 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:39,786 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-12-24 14:29:39,786 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 30128, now seen corresponding path program 1 times [2018-12-24 14:29:39,787 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:39,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:39,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:39,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:39,788 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:39,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:39,874 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:39,874 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 4 with the following transitions: [2018-12-24 14:29:39,874 INFO L207 CegarAbsIntRunner]: [0], [10], [27] [2018-12-24 14:29:39,876 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:39,876 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:40,170 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:40,170 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. [2018-12-24 14:29:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:40,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:40,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:40,171 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 [2018-12-24 14:29:40,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:40,192 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:40,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:40,390 WARN L181 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:29:40,400 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 21 treesize of output 24 [2018-12-24 14:29:40,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:40,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,414 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 26 treesize of output 40 [2018-12-24 14:29:40,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:40,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,433 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 30 treesize of output 72 [2018-12-24 14:29:40,447 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:40,448 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,477 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,501 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,518 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,532 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,544 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,575 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 48 treesize of output 54 [2018-12-24 14:29:40,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,611 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:29:40,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:29:40,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:40,700 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,715 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,730 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,748 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,780 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. [2018-12-24 14:29:40,781 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:40,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:40,816 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:29:40,817 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:40,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:40,848 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:40,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:40,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:40,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:29:40,901 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:40,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:29:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:29:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:29:40,902 INFO L87 Difference]: Start difference. First operand 23 states and 67 transitions. Second operand 6 states. [2018-12-24 14:29:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:41,081 INFO L93 Difference]: Finished difference Result 49 states and 101 transitions. [2018-12-24 14:29:41,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:29:41,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 3 [2018-12-24 14:29:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:41,083 INFO L225 Difference]: With dead ends: 49 [2018-12-24 14:29:41,083 INFO L226 Difference]: Without dead ends: 47 [2018-12-24 14:29:41,084 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 [2018-12-24 14:29:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-24 14:29:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2018-12-24 14:29:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-24 14:29:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 80 transitions. [2018-12-24 14:29:41,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 80 transitions. Word has length 3 [2018-12-24 14:29:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:41,092 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 80 transitions. [2018-12-24 14:29:41,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:29:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 80 transitions. [2018-12-24 14:29:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:41,093 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:41,093 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:41,093 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 941528, now seen corresponding path program 1 times [2018-12-24 14:29:41,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:41,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:41,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:41,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:41,095 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:41,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:41,160 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:41,160 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:41,161 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [27] [2018-12-24 14:29:41,164 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:41,164 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:41,633 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:41,633 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. [2018-12-24 14:29:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:41,634 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:41,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:41,634 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:29:41,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:41,652 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:41,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:41,720 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 21 treesize of output 24 [2018-12-24 14:29:41,723 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 24 treesize of output 30 [2018-12-24 14:29:41,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,732 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 26 treesize of output 40 [2018-12-24 14:29:41,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:41,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,771 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,788 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 30 treesize of output 72 [2018-12-24 14:29:41,838 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:41,839 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:41,872 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:41,898 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:41,919 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:41,936 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:41,950 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:41,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:41,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:29:42,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,023 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 41 treesize of output 53 [2018-12-24 14:29:42,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,066 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 32 treesize of output 61 [2018-12-24 14:29:42,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,138 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:42,139 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:42,153 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:42,167 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:42,183 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:42,217 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:42,218 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:42,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,289 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:29:42,289 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:42,323 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:42,323 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:42,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,384 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:42,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:29:42,386 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:42,416 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:42,416 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:29:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:42,434 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:42,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:42,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:29:42,478 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:42,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:42,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:29:42,479 INFO L87 Difference]: Start difference. First operand 25 states and 80 transitions. Second operand 8 states. [2018-12-24 14:29:43,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:43,056 INFO L93 Difference]: Finished difference Result 61 states and 138 transitions. [2018-12-24 14:29:43,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:29:43,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:43,059 INFO L225 Difference]: With dead ends: 61 [2018-12-24 14:29:43,059 INFO L226 Difference]: Without dead ends: 57 [2018-12-24 14:29:43,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:29:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-24 14:29:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 29. [2018-12-24 14:29:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-24 14:29:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 98 transitions. [2018-12-24 14:29:43,068 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 98 transitions. Word has length 4 [2018-12-24 14:29:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:43,069 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 98 transitions. [2018-12-24 14:29:43,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:43,069 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 98 transitions. [2018-12-24 14:29:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:43,069 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:43,070 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:43,070 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:43,070 INFO L82 PathProgramCache]: Analyzing trace with hash 941590, now seen corresponding path program 1 times [2018-12-24 14:29:43,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:43,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:43,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:43,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:43,071 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:43,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:43,162 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:43,162 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:43,162 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [27] [2018-12-24 14:29:43,163 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:43,163 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:43,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:43,636 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. [2018-12-24 14:29:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:43,637 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:43,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:43,637 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:29:43,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:43,658 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:43,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:43,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:29:43,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,762 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:29:43,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:29:43,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:29:43,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:43,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:29:43,945 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:43,971 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:43,997 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,025 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,062 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:29:44,103 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:44,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:44,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:44,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:29:44,135 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:29:44,136 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,232 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,269 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,295 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,316 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,332 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,391 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:44,392 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:29:44,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:29:44,503 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,564 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:44,565 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:29:44,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:44,619 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:29:44,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:29:44,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:44,668 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. [2018-12-24 14:29:44,669 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:29:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:44,690 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:44,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:44,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:44,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:29:44,736 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:44,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:44,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:29:44,737 INFO L87 Difference]: Start difference. First operand 29 states and 98 transitions. Second operand 8 states. [2018-12-24 14:29:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:45,213 INFO L93 Difference]: Finished difference Result 59 states and 140 transitions. [2018-12-24 14:29:45,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:29:45,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:45,217 INFO L225 Difference]: With dead ends: 59 [2018-12-24 14:29:45,217 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 14:29:45,218 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 [2018-12-24 14:29:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 14:29:45,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-12-24 14:29:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 14:29:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 110 transitions. [2018-12-24 14:29:45,226 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 110 transitions. Word has length 4 [2018-12-24 14:29:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:45,226 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 110 transitions. [2018-12-24 14:29:45,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 110 transitions. [2018-12-24 14:29:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:45,227 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:45,227 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:45,228 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 941156, now seen corresponding path program 1 times [2018-12-24 14:29:45,228 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:45,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:45,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:45,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:45,229 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:45,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:45,333 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:45,333 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:45,333 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [27] [2018-12-24 14:29:45,336 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:45,336 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:45,766 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:45,766 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. [2018-12-24 14:29:45,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:45,766 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:45,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:45,767 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 [2018-12-24 14:29:45,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:45,783 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:45,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:45,966 WARN L181 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:29:45,968 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 21 treesize of output 24 [2018-12-24 14:29:45,973 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:45,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:45,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:45,979 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 26 treesize of output 40 [2018-12-24 14:29:45,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:45,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,000 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,001 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 28 treesize of output 54 [2018-12-24 14:29:46,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:29:46,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:46,026 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,055 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,079 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,098 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,116 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,129 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,159 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 48 treesize of output 54 [2018-12-24 14:29:46,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,192 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 41 treesize of output 53 [2018-12-24 14:29:46,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,232 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 32 treesize of output 61 [2018-12-24 14:29:46,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:46,287 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,304 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,320 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,337 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,371 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:46,372 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:46,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,420 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:29:46,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:46,450 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:46,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:46,475 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:29:46,476 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:29:46,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:46,508 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:46,509 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2018-12-24 14:29:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:46,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:46,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:46,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:29:46,580 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:46,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:29:46,581 INFO L87 Difference]: Start difference. First operand 30 states and 110 transitions. Second operand 8 states. [2018-12-24 14:29:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:47,016 INFO L93 Difference]: Finished difference Result 57 states and 144 transitions. [2018-12-24 14:29:47,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:29:47,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:47,018 INFO L225 Difference]: With dead ends: 57 [2018-12-24 14:29:47,018 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 14:29:47,018 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:29:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 14:29:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-12-24 14:29:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-24 14:29:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 109 transitions. [2018-12-24 14:29:47,028 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 109 transitions. Word has length 4 [2018-12-24 14:29:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:47,028 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 109 transitions. [2018-12-24 14:29:47,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 109 transitions. [2018-12-24 14:29:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:47,029 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:47,029 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:47,029 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:47,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:47,030 INFO L82 PathProgramCache]: Analyzing trace with hash 941280, now seen corresponding path program 1 times [2018-12-24 14:29:47,030 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:47,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:47,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:47,031 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:47,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:47,177 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:47,177 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:47,177 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [27] [2018-12-24 14:29:47,178 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:47,179 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:47,638 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:47,638 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. [2018-12-24 14:29:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:47,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:47,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:47,639 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 [2018-12-24 14:29:47,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:47,655 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:47,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:47,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,752 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 48 treesize of output 54 [2018-12-24 14:29:47,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:29:47,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,828 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 32 treesize of output 61 [2018-12-24 14:29:47,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:47,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:47,892 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:47,908 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:47,925 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:47,943 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:47,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:29:47,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:47,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:47,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:47,995 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 30 treesize of output 72 [2018-12-24 14:29:48,003 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:48,004 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,409 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,614 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,629 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,641 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,654 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,688 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:48,688 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:48,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,733 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:29:48,734 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,763 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:48,763 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:48,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:48,801 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:29:48,802 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:48,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:48,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:29:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:48,857 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:48,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:48,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:29:48,901 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:48,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:48,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:29:48,902 INFO L87 Difference]: Start difference. First operand 30 states and 109 transitions. Second operand 8 states. [2018-12-24 14:29:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:49,371 INFO L93 Difference]: Finished difference Result 57 states and 158 transitions. [2018-12-24 14:29:49,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:29:49,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:49,373 INFO L225 Difference]: With dead ends: 57 [2018-12-24 14:29:49,373 INFO L226 Difference]: Without dead ends: 53 [2018-12-24 14:29:49,374 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:29:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-24 14:29:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2018-12-24 14:29:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-12-24 14:29:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 126 transitions. [2018-12-24 14:29:49,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 126 transitions. Word has length 4 [2018-12-24 14:29:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:49,385 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 126 transitions. [2018-12-24 14:29:49,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 126 transitions. [2018-12-24 14:29:49,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:49,385 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:49,386 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:49,386 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash 929872, now seen corresponding path program 1 times [2018-12-24 14:29:49,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:49,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:49,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:49,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:49,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:49,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:49,496 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:49,496 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:49,497 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [27] [2018-12-24 14:29:49,499 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:49,499 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:49,865 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:49,866 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. [2018-12-24 14:29:49,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:49,866 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:49,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:49,866 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:29:49,882 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:49,883 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:49,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:50,053 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:29:50,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,058 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 48 treesize of output 54 [2018-12-24 14:29:50,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,091 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 41 treesize of output 53 [2018-12-24 14:29:50,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,132 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 32 treesize of output 61 [2018-12-24 14:29:50,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:50,253 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,271 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,288 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,306 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,333 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:29:50,336 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:50,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:50,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:50,351 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 30 treesize of output 72 [2018-12-24 14:29:50,359 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:50,360 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,386 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,407 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,423 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,437 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,448 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,484 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. [2018-12-24 14:29:50,485 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:50,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,522 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:29:50,523 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,554 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:50,554 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:50,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:50,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:29:50,583 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:50,619 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:50,619 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2018-12-24 14:29:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:50,634 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:50,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:50,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:29:50,671 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:50,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:29:50,671 INFO L87 Difference]: Start difference. First operand 31 states and 126 transitions. Second operand 8 states. [2018-12-24 14:29:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:51,029 INFO L93 Difference]: Finished difference Result 73 states and 228 transitions. [2018-12-24 14:29:51,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:29:51,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:51,032 INFO L225 Difference]: With dead ends: 73 [2018-12-24 14:29:51,032 INFO L226 Difference]: Without dead ends: 71 [2018-12-24 14:29:51,032 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:29:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-24 14:29:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 40. [2018-12-24 14:29:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-12-24 14:29:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 173 transitions. [2018-12-24 14:29:51,043 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 173 transitions. Word has length 4 [2018-12-24 14:29:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:51,044 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 173 transitions. [2018-12-24 14:29:51,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 173 transitions. [2018-12-24 14:29:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:51,044 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:51,045 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:51,045 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash 930184, now seen corresponding path program 1 times [2018-12-24 14:29:51,045 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:51,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:51,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:51,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:51,046 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:51,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:51,173 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:51,173 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:51,173 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [29] [2018-12-24 14:29:51,174 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:51,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:51,389 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:51,389 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. [2018-12-24 14:29:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:51,389 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:51,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:51,389 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 [2018-12-24 14:29:51,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:51,404 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:51,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:51,439 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 21 treesize of output 24 [2018-12-24 14:29:51,445 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 24 treesize of output 30 [2018-12-24 14:29:51,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,459 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:51,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,467 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:51,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:29:51,501 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:51,502 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:51,534 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:51,557 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:51,576 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:51,590 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:51,603 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:51,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:51,634 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 48 treesize of output 54 [2018-12-24 14:29:52,026 WARN L181 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-12-24 14:29:52,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,042 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 41 treesize of output 53 [2018-12-24 14:29:52,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,084 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 32 treesize of output 61 [2018-12-24 14:29:52,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:52,139 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:52,156 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:52,175 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:52,194 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:52,232 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. [2018-12-24 14:29:52,233 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:52,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:52,326 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:29:52,326 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:52,361 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:52,361 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:52,376 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:52,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:52,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:29:52,409 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:52,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:29:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:29:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:29:52,410 INFO L87 Difference]: Start difference. First operand 40 states and 173 transitions. Second operand 6 states. [2018-12-24 14:29:52,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:52,623 INFO L93 Difference]: Finished difference Result 56 states and 192 transitions. [2018-12-24 14:29:52,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:29:52,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:29:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:52,625 INFO L225 Difference]: With dead ends: 56 [2018-12-24 14:29:52,625 INFO L226 Difference]: Without dead ends: 55 [2018-12-24 14:29:52,626 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 [2018-12-24 14:29:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-12-24 14:29:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2018-12-24 14:29:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-24 14:29:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 180 transitions. [2018-12-24 14:29:52,638 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 180 transitions. Word has length 4 [2018-12-24 14:29:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:52,638 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 180 transitions. [2018-12-24 14:29:52,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:29:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 180 transitions. [2018-12-24 14:29:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:52,639 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:52,639 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:52,639 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash 945434, now seen corresponding path program 1 times [2018-12-24 14:29:52,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:52,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:52,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:52,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:52,641 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:52,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:52,744 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:52,744 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:52,744 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [27] [2018-12-24 14:29:52,746 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:52,747 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:53,226 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:53,226 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. [2018-12-24 14:29:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:53,226 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:53,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:53,227 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 [2018-12-24 14:29:53,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:53,237 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:53,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:53,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:29:53,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,329 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:29:53,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,379 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:29:53,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:29:53,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:29:53,525 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,575 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,605 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,642 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,674 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,735 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 21 treesize of output 24 [2018-12-24 14:29:53,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:53,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:53,752 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:53,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:29:53,778 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:29:53,779 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,818 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,840 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,855 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,869 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,888 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:53,936 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:53,936 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:29:53,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:53,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:29:53,973 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:54,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:54,019 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:29:54,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:54,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:29:54,151 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:54,198 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. [2018-12-24 14:29:54,199 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:81, output treesize:55 [2018-12-24 14:29:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:54,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:54,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:54,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:29:54,256 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:54,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:29:54,256 INFO L87 Difference]: Start difference. First operand 42 states and 180 transitions. Second operand 8 states. [2018-12-24 14:29:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:54,837 INFO L93 Difference]: Finished difference Result 96 states and 313 transitions. [2018-12-24 14:29:54,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:29:54,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:54,839 INFO L225 Difference]: With dead ends: 96 [2018-12-24 14:29:54,839 INFO L226 Difference]: Without dead ends: 93 [2018-12-24 14:29:54,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:29:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-24 14:29:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2018-12-24 14:29:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-12-24 14:29:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 250 transitions. [2018-12-24 14:29:54,858 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 250 transitions. Word has length 4 [2018-12-24 14:29:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:54,858 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 250 transitions. [2018-12-24 14:29:54,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 250 transitions. [2018-12-24 14:29:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:54,859 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:54,859 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:54,860 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:54,860 INFO L82 PathProgramCache]: Analyzing trace with hash 945000, now seen corresponding path program 1 times [2018-12-24 14:29:54,860 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:54,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:54,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:54,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:54,861 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:54,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:54,934 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:54,934 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:54,934 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [27] [2018-12-24 14:29:54,935 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:54,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:55,233 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:55,233 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. [2018-12-24 14:29:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:55,233 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:55,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:55,234 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 [2018-12-24 14:29:55,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:55,242 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:55,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:55,277 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 21 treesize of output 24 [2018-12-24 14:29:55,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:29:55,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,290 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 26 treesize of output 40 [2018-12-24 14:29:55,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:55,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,351 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 30 treesize of output 72 [2018-12-24 14:29:55,367 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:29:55,368 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,396 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,420 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,439 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,455 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,469 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:29:55,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,534 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:29:55,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:29:55,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,661 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:29:55,661 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,676 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,692 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,709 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,743 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:55,743 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:29:55,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,783 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:29:55,784 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,815 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:55,816 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:29:55,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,843 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:55,848 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:29:55,848 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:55,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:55,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:38 [2018-12-24 14:29:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:55,906 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:55,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:55,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:29:55,952 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:55,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:29:55,952 INFO L87 Difference]: Start difference. First operand 55 states and 250 transitions. Second operand 8 states. [2018-12-24 14:29:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:56,473 INFO L93 Difference]: Finished difference Result 84 states and 299 transitions. [2018-12-24 14:29:56,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:29:56,474 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:56,475 INFO L225 Difference]: With dead ends: 84 [2018-12-24 14:29:56,475 INFO L226 Difference]: Without dead ends: 82 [2018-12-24 14:29:56,476 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:29:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-12-24 14:29:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2018-12-24 14:29:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-12-24 14:29:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 270 transitions. [2018-12-24 14:29:56,491 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 270 transitions. Word has length 4 [2018-12-24 14:29:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:56,491 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 270 transitions. [2018-12-24 14:29:56,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 270 transitions. [2018-12-24 14:29:56,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:56,492 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:56,492 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:56,492 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 946922, now seen corresponding path program 1 times [2018-12-24 14:29:56,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:56,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:56,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:56,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:56,494 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:56,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:56,583 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:56,583 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:56,584 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [27] [2018-12-24 14:29:56,585 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:56,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:57,424 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:57,425 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. [2018-12-24 14:29:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:57,425 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:57,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:57,425 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 [2018-12-24 14:29:57,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:57,437 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:57,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:57,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:29:57,522 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 24 treesize of output 30 [2018-12-24 14:29:57,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,531 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:29:57,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,541 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:29:57,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,548 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 30 treesize of output 72 [2018-12-24 14:29:57,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,560 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:29:57,560 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,603 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,624 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,643 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,659 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,672 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,702 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:29:57,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,742 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:29:57,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,790 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:29:57,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,849 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:29:57,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:57,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:29:57,923 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,949 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:57,975 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,002 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,027 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,074 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:58,075 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:29:58,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:29:58,130 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,177 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:58,177 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:29:58,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,237 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:58,240 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:29:58,241 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:29:58,242 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:58,292 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:29:58,293 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:29:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:58,311 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:29:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:58,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:29:58,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:29:58,359 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:29:58,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:29:58,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:29:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:29:58,360 INFO L87 Difference]: Start difference. First operand 58 states and 270 transitions. Second operand 8 states. [2018-12-24 14:29:59,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:29:59,235 INFO L93 Difference]: Finished difference Result 91 states and 313 transitions. [2018-12-24 14:29:59,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:29:59,236 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:29:59,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:29:59,237 INFO L225 Difference]: With dead ends: 91 [2018-12-24 14:29:59,237 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 14:29:59,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:29:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 14:29:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 59. [2018-12-24 14:29:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-24 14:29:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 277 transitions. [2018-12-24 14:29:59,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 277 transitions. Word has length 4 [2018-12-24 14:29:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:29:59,262 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 277 transitions. [2018-12-24 14:29:59,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:29:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 277 transitions. [2018-12-24 14:29:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:29:59,266 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:29:59,266 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:29:59,266 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:29:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:59,267 INFO L82 PathProgramCache]: Analyzing trace with hash 934028, now seen corresponding path program 1 times [2018-12-24 14:29:59,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:29:59,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:59,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:59,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:29:59,268 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:29:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:29:59,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:59,403 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:29:59,404 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:29:59,404 INFO L207 CegarAbsIntRunner]: [0], [10], [28], [29] [2018-12-24 14:29:59,405 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:29:59,406 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:29:59,682 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:29:59,682 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. [2018-12-24 14:29:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:29:59,683 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:29:59,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:29:59,683 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 [2018-12-24 14:29:59,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:29:59,699 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:29:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:29:59,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:29:59,710 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 21 treesize of output 24 [2018-12-24 14:29:59,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:29:59,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,727 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 26 treesize of output 36 [2018-12-24 14:29:59,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,738 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 28 treesize of output 50 [2018-12-24 14:29:59,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,766 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:29:59,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:29:59,787 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,828 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,854 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,878 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,892 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,906 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:29:59,931 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 43 treesize of output 39 [2018-12-24 14:29:59,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,949 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 36 treesize of output 49 [2018-12-24 14:29:59,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:29:59,986 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 32 treesize of output 57 [2018-12-24 14:30:00,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:30:00,035 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:00,050 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:00,065 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:00,082 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:00,113 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. [2018-12-24 14:30:00,114 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:64, output treesize:67 [2018-12-24 14:30:00,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:30:00,148 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:30:00,244 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:30:00,244 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:92 [2018-12-24 14:30:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:00,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:00,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-24 14:30:00,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 5 [2018-12-24 14:30:00,334 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:30:00,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:30:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:30:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:30:00,335 INFO L87 Difference]: Start difference. First operand 59 states and 277 transitions. Second operand 4 states. [2018-12-24 14:30:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:00,460 INFO L93 Difference]: Finished difference Result 90 states and 454 transitions. [2018-12-24 14:30:00,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:30:00,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-12-24 14:30:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:00,463 INFO L225 Difference]: With dead ends: 90 [2018-12-24 14:30:00,463 INFO L226 Difference]: Without dead ends: 89 [2018-12-24 14:30:00,463 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-12-24 14:30:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-12-24 14:30:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2018-12-24 14:30:00,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-24 14:30:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 449 transitions. [2018-12-24 14:30:00,480 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 449 transitions. Word has length 4 [2018-12-24 14:30:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:00,481 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 449 transitions. [2018-12-24 14:30:00,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:30:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 449 transitions. [2018-12-24 14:30:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:00,482 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:00,482 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:00,483 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash 933592, now seen corresponding path program 1 times [2018-12-24 14:30:00,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:00,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:00,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:00,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:00,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:00,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:00,584 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:00,584 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:00,584 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [27] [2018-12-24 14:30:00,585 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:00,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:00,881 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:00,882 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. [2018-12-24 14:30:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:00,882 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:00,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:00,882 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 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 [2018-12-24 14:30:00,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:00,895 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:00,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:00,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,940 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 48 treesize of output 54 [2018-12-24 14:30:00,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:00,985 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 41 treesize of output 53 [2018-12-24 14:30:01,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:30:01,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,082 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:01,082 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,105 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,128 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,152 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:01,343 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:01,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:01,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:01,381 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 30 treesize of output 72 [2018-12-24 14:30:01,398 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:01,398 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,427 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,448 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,465 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,479 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,491 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,525 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:01,525 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:01,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,566 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:30:01,566 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:01,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:01,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:01,627 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:30:01,627 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:01,661 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:01,661 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:30:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:01,679 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:01,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:01,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:01,722 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:01,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:01,722 INFO L87 Difference]: Start difference. First operand 83 states and 449 transitions. Second operand 8 states. [2018-12-24 14:30:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:02,141 INFO L93 Difference]: Finished difference Result 121 states and 532 transitions. [2018-12-24 14:30:02,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:02,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2018-12-24 14:30:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:02,145 INFO L225 Difference]: With dead ends: 121 [2018-12-24 14:30:02,145 INFO L226 Difference]: Without dead ends: 119 [2018-12-24 14:30:02,146 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-12-24 14:30:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 91. [2018-12-24 14:30:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-24 14:30:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2018-12-24 14:30:02,165 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2018-12-24 14:30:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:02,165 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2018-12-24 14:30:02,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2018-12-24 14:30:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-12-24 14:30:02,167 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:02,167 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-12-24 14:30:02,167 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash 937872, now seen corresponding path program 1 times [2018-12-24 14:30:02,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:02,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:02,169 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:02,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:02,169 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:02,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:02,210 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:02,210 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 5 with the following transitions: [2018-12-24 14:30:02,210 INFO L207 CegarAbsIntRunner]: [0], [14], [28], [29] [2018-12-24 14:30:02,211 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:02,211 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:02,459 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:02,459 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. [2018-12-24 14:30:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:02,459 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:02,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:02,460 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-12-24 14:30:02,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:02,479 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:02,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:02,519 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 21 treesize of output 24 [2018-12-24 14:30:02,559 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 24 treesize of output 26 [2018-12-24 14:30:02,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,631 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 26 treesize of output 36 [2018-12-24 14:30:02,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:30:02,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,674 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:30:02,687 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:30:02,688 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,719 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,744 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,762 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,777 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,792 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,820 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 43 treesize of output 39 [2018-12-24 14:30:02,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,838 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 36 treesize of output 49 [2018-12-24 14:30:02,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,898 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 32 treesize of output 57 [2018-12-24 14:30:02,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:02,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:30:02,944 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,957 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,972 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:02,989 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,020 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. [2018-12-24 14:30:03,020 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:30:03,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,053 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:30:03,053 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,081 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:03,081 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:46 [2018-12-24 14:30:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:03,098 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:03,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:03,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:30:03,129 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:03,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:30:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:30:03,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:30:03,130 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 6 states. [2018-12-24 14:30:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:03,366 INFO L93 Difference]: Finished difference Result 110 states and 511 transitions. [2018-12-24 14:30:03,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:30:03,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 4 [2018-12-24 14:30:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:03,368 INFO L225 Difference]: With dead ends: 110 [2018-12-24 14:30:03,369 INFO L226 Difference]: Without dead ends: 109 [2018-12-24 14:30:03,369 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 [2018-12-24 14:30:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-12-24 14:30:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2018-12-24 14:30:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-12-24 14:30:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 493 transitions. [2018-12-24 14:30:03,384 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 493 transitions. Word has length 4 [2018-12-24 14:30:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:03,384 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 493 transitions. [2018-12-24 14:30:03,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:30:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 493 transitions. [2018-12-24 14:30:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:03,386 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:03,386 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-12-24 14:30:03,386 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:03,386 INFO L82 PathProgramCache]: Analyzing trace with hash 29182900, now seen corresponding path program 2 times [2018-12-24 14:30:03,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:03,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:03,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:03,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:03,387 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:03,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:03,470 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:03,470 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:30:03,470 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:30:03,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:03,471 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 [2018-12-24 14:30:03,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:30:03,480 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:30:03,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:30:03,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:30:03,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:03,517 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 21 treesize of output 24 [2018-12-24 14:30:03,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:03,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,526 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 26 treesize of output 40 [2018-12-24 14:30:03,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:03,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,543 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:03,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:03,558 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:03,559 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,598 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:03,900 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,072 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,086 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,101 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:04,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,176 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:04,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:04,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:04,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,358 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:04,358 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,388 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,415 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,442 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,469 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,517 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. [2018-12-24 14:30:04,517 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:04,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:04,555 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,599 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:04,599 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:04,620 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,623 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 103 [2018-12-24 14:30:04,631 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,699 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. [2018-12-24 14:30:04,699 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:71 [2018-12-24 14:30:04,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:04,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:30:04,759 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:04,827 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. [2018-12-24 14:30:04,827 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:57 [2018-12-24 14:30:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:05,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:05,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:05,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:30:05,584 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:05,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:05,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:05,585 INFO L87 Difference]: Start difference. First operand 91 states and 493 transitions. Second operand 10 states. [2018-12-24 14:30:06,548 WARN L181 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-12-24 14:30:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:07,323 INFO L93 Difference]: Finished difference Result 133 states and 606 transitions. [2018-12-24 14:30:07,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:30:07,323 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:07,326 INFO L225 Difference]: With dead ends: 133 [2018-12-24 14:30:07,326 INFO L226 Difference]: Without dead ends: 128 [2018-12-24 14:30:07,327 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-12-24 14:30:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2018-12-24 14:30:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-12-24 14:30:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 538 transitions. [2018-12-24 14:30:07,346 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 538 transitions. Word has length 5 [2018-12-24 14:30:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:07,347 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 538 transitions. [2018-12-24 14:30:07,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 538 transitions. [2018-12-24 14:30:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:07,348 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:07,348 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:07,348 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:07,348 INFO L82 PathProgramCache]: Analyzing trace with hash 29172052, now seen corresponding path program 1 times [2018-12-24 14:30:07,349 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:07,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:07,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:30:07,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:07,350 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:07,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:07,630 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:07,630 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:07,631 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [29] [2018-12-24 14:30:07,632 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:07,632 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:07,905 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:07,905 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:07,906 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:07,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:07,906 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 [2018-12-24 14:30:07,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:07,915 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:07,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:07,942 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 21 treesize of output 24 [2018-12-24 14:30:07,949 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 24 treesize of output 30 [2018-12-24 14:30:07,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,960 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 26 treesize of output 40 [2018-12-24 14:30:07,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:07,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:07,985 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 30 treesize of output 72 [2018-12-24 14:30:08,033 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:08,034 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,064 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,087 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,106 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,119 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,133 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,163 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,164 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 48 treesize of output 54 [2018-12-24 14:30:08,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,199 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 41 treesize of output 53 [2018-12-24 14:30:08,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,240 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 32 treesize of output 61 [2018-12-24 14:30:08,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:08,294 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,310 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,327 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,344 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,377 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:08,378 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:08,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:30:08,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,447 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:08,447 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:08,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:08,478 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:30:08,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:08,511 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:08,512 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:30:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:08,579 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:08,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:08,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:08,623 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:08,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:08,624 INFO L87 Difference]: Start difference. First operand 95 states and 538 transitions. Second operand 8 states. [2018-12-24 14:30:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:08,973 INFO L93 Difference]: Finished difference Result 125 states and 622 transitions. [2018-12-24 14:30:08,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:08,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:30:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:08,976 INFO L225 Difference]: With dead ends: 125 [2018-12-24 14:30:08,976 INFO L226 Difference]: Without dead ends: 124 [2018-12-24 14:30:08,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-12-24 14:30:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2018-12-24 14:30:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-12-24 14:30:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 589 transitions. [2018-12-24 14:30:08,997 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 589 transitions. Word has length 5 [2018-12-24 14:30:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:08,998 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 589 transitions. [2018-12-24 14:30:08,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 589 transitions. [2018-12-24 14:30:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:08,999 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:08,999 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:08,999 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:08,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:08,999 INFO L82 PathProgramCache]: Analyzing trace with hash 29187302, now seen corresponding path program 1 times [2018-12-24 14:30:09,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:09,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:09,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:09,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:09,001 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:09,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:09,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:09,183 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:09,183 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [27] [2018-12-24 14:30:09,184 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:09,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:09,598 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:09,598 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:09,599 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:09,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:09,599 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 [2018-12-24 14:30:09,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:09,610 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:09,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:09,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,646 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:09,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:09,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,748 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:09,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:09,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:09,926 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:09,927 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:09,965 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,002 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,041 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,075 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,123 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 21 treesize of output 24 [2018-12-24 14:30:10,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:10,130 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:10,133 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:10,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:10,139 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:10,140 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,184 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,205 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,222 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,236 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,249 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:10,297 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:10,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,334 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:10,335 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,380 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:10,381 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:10,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,419 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 105 [2018-12-24 14:30:10,420 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:10,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:30:10,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,510 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:10,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:10,512 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:30:10,512 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:10,572 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. [2018-12-24 14:30:10,572 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:30:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:10,598 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:10,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:10,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:10,672 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:10,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:10,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:10,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:10,673 INFO L87 Difference]: Start difference. First operand 102 states and 589 transitions. Second operand 10 states. [2018-12-24 14:30:10,815 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-12-24 14:30:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:12,479 INFO L93 Difference]: Finished difference Result 149 states and 665 transitions. [2018-12-24 14:30:12,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:30:12,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:12,481 INFO L225 Difference]: With dead ends: 149 [2018-12-24 14:30:12,481 INFO L226 Difference]: Without dead ends: 145 [2018-12-24 14:30:12,482 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:30:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-12-24 14:30:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2018-12-24 14:30:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-24 14:30:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 605 transitions. [2018-12-24 14:30:12,503 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 605 transitions. Word has length 5 [2018-12-24 14:30:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:12,504 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 605 transitions. [2018-12-24 14:30:12,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 605 transitions. [2018-12-24 14:30:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:12,504 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:12,505 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:12,505 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:12,505 INFO L82 PathProgramCache]: Analyzing trace with hash 29186868, now seen corresponding path program 1 times [2018-12-24 14:30:12,505 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:12,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:12,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:12,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:12,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:12,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:12,733 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:12,733 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:12,733 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [27] [2018-12-24 14:30:12,734 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:12,734 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:13,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:13,266 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:13,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:13,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:13,268 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 [2018-12-24 14:30:13,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:13,280 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:13,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:13,403 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:30:13,406 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 21 treesize of output 24 [2018-12-24 14:30:13,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:13,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,414 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 26 treesize of output 40 [2018-12-24 14:30:13,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,426 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:13,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,435 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 30 treesize of output 72 [2018-12-24 14:30:13,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:13,442 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,470 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,492 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,510 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,524 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,537 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:30:13,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:30:13,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,641 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 32 treesize of output 61 [2018-12-24 14:30:13,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:13,691 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,706 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,723 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,739 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,773 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,773 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:13,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,829 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:30:13,829 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,859 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,859 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:13,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:30:13,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,928 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:30:13,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,961 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:13,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:13,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:30:13,964 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:13,999 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:13,999 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:30:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:14,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:14,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:14,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:14,081 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:14,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:14,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:14,081 INFO L87 Difference]: Start difference. First operand 105 states and 605 transitions. Second operand 10 states. [2018-12-24 14:30:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:14,646 INFO L93 Difference]: Finished difference Result 138 states and 662 transitions. [2018-12-24 14:30:14,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:14,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:14,648 INFO L225 Difference]: With dead ends: 138 [2018-12-24 14:30:14,649 INFO L226 Difference]: Without dead ends: 136 [2018-12-24 14:30:14,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:30:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-12-24 14:30:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2018-12-24 14:30:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-24 14:30:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 598 transitions. [2018-12-24 14:30:14,671 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 598 transitions. Word has length 5 [2018-12-24 14:30:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:14,671 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 598 transitions. [2018-12-24 14:30:14,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 598 transitions. [2018-12-24 14:30:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:14,672 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:14,672 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:14,673 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash 29188666, now seen corresponding path program 1 times [2018-12-24 14:30:14,673 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:14,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:14,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:14,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:14,674 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:14,824 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-12-24 14:30:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:14,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:14,843 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:14,843 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:14,843 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [27] [2018-12-24 14:30:14,845 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:14,845 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:15,259 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:15,259 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:15,260 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:15,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:15,260 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 [2018-12-24 14:30:15,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:15,272 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:15,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:15,401 WARN L181 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-12-24 14:30:15,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,405 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:15,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:15,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,493 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:15,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,551 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 37 treesize of output 80 [2018-12-24 14:30:15,622 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:15,632 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,660 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,688 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,716 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,744 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,782 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 21 treesize of output 24 [2018-12-24 14:30:15,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:15,789 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:15,793 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:15,799 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:15,802 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:15,802 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,838 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,859 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,876 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,890 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,902 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:15,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:15,949 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:15,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:15,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:15,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:16,021 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:16,021 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:16,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,051 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:16,052 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:30:16,052 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:16,101 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. [2018-12-24 14:30:16,101 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:30:16,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:16,136 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:30:16,137 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:16,184 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. [2018-12-24 14:30:16,185 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2018-12-24 14:30:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:16,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:16,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:16,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:30:16,250 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:16,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:16,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:16,251 INFO L87 Difference]: Start difference. First operand 104 states and 598 transitions. Second operand 10 states. [2018-12-24 14:30:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:16,866 INFO L93 Difference]: Finished difference Result 152 states and 738 transitions. [2018-12-24 14:30:16,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:30:16,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:16,869 INFO L225 Difference]: With dead ends: 152 [2018-12-24 14:30:16,870 INFO L226 Difference]: Without dead ends: 151 [2018-12-24 14:30:16,870 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:30:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-12-24 14:30:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2018-12-24 14:30:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-12-24 14:30:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 612 transitions. [2018-12-24 14:30:16,888 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 612 transitions. Word has length 5 [2018-12-24 14:30:16,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:16,889 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 612 transitions. [2018-12-24 14:30:16,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 612 transitions. [2018-12-24 14:30:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:16,889 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:16,889 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:16,890 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash 29188790, now seen corresponding path program 1 times [2018-12-24 14:30:16,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:16,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:16,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:16,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:16,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:17,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:17,008 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:17,008 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:17,009 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [27] [2018-12-24 14:30:17,011 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:17,011 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:17,437 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:17,438 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:17,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:17,438 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:17,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:17,438 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 [2018-12-24 14:30:17,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:17,447 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:17,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:17,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:17,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:17,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,607 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:17,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:17,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:17,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:17,770 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:17,801 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:17,832 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:17,863 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:17,897 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:17,941 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 21 treesize of output 24 [2018-12-24 14:30:17,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:17,947 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:17,950 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:17,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:17,958 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:17,958 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:17,997 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,016 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,031 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,045 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,057 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,103 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:18,104 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:18,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:18,140 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,184 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:18,184 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:18,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,220 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:18,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:30:18,222 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:18,270 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2018-12-24 14:30:18,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:18,305 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:18,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 108 [2018-12-24 14:30:18,307 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:18,623 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. [2018-12-24 14:30:18,623 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:57 [2018-12-24 14:30:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:20,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:20,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:20,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:20,268 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:20,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:20,269 INFO L87 Difference]: Start difference. First operand 106 states and 612 transitions. Second operand 10 states. [2018-12-24 14:30:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:21,033 INFO L93 Difference]: Finished difference Result 141 states and 665 transitions. [2018-12-24 14:30:21,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:21,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:21,036 INFO L225 Difference]: With dead ends: 141 [2018-12-24 14:30:21,036 INFO L226 Difference]: Without dead ends: 140 [2018-12-24 14:30:21,037 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:30:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-12-24 14:30:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2018-12-24 14:30:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-12-24 14:30:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 619 transitions. [2018-12-24 14:30:21,059 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 619 transitions. Word has length 5 [2018-12-24 14:30:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:21,060 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 619 transitions. [2018-12-24 14:30:21,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 619 transitions. [2018-12-24 14:30:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:21,061 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:21,061 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:21,061 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 29175212, now seen corresponding path program 1 times [2018-12-24 14:30:21,061 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:21,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:21,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:21,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:21,062 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:21,413 WARN L181 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2018-12-24 14:30:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:21,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:21,736 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:21,736 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:21,736 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [27] [2018-12-24 14:30:21,737 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:21,737 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:22,147 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:22,148 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:22,148 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:22,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:22,149 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 [2018-12-24 14:30:22,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:22,158 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:22,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:22,199 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:22,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:22,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,211 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 26 treesize of output 40 [2018-12-24 14:30:22,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,224 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 28 treesize of output 54 [2018-12-24 14:30:22,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,237 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:22,243 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:22,244 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,291 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,315 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,334 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,349 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,363 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,395 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 48 treesize of output 54 [2018-12-24 14:30:22,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:30:22,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,470 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 32 treesize of output 61 [2018-12-24 14:30:22,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,520 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:22,521 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,538 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,555 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,571 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:22,606 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:22,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,643 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:30:22,643 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,672 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:22,672 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:22,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,697 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:22,698 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:30:22,699 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,739 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:22,740 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:42 [2018-12-24 14:30:22,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:22,787 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2018-12-24 14:30:22,788 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:22,820 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:22,821 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-12-24 14:30:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:22,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:22,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:22,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:30:22,888 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:22,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:22,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:22,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:22,889 INFO L87 Difference]: Start difference. First operand 107 states and 619 transitions. Second operand 10 states. [2018-12-24 14:30:23,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:23,575 INFO L93 Difference]: Finished difference Result 163 states and 816 transitions. [2018-12-24 14:30:23,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:30:23,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:23,579 INFO L225 Difference]: With dead ends: 163 [2018-12-24 14:30:23,579 INFO L226 Difference]: Without dead ends: 162 [2018-12-24 14:30:23,580 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:30:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-12-24 14:30:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 116. [2018-12-24 14:30:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-12-24 14:30:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 682 transitions. [2018-12-24 14:30:23,604 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 682 transitions. Word has length 5 [2018-12-24 14:30:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:23,605 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 682 transitions. [2018-12-24 14:30:23,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 682 transitions. [2018-12-24 14:30:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:23,606 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:23,606 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:23,606 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash 29179614, now seen corresponding path program 1 times [2018-12-24 14:30:23,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:23,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:23,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:23,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:23,608 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:23,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:23,709 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:23,709 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:23,709 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [27] [2018-12-24 14:30:23,711 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:23,711 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:24,109 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:24,109 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:24,109 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:24,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:24,110 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 [2018-12-24 14:30:24,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:24,117 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:24,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:24,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:24,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:24,261 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:24,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:24,468 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 14:30:24,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,481 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:24,482 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,509 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,536 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,564 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,592 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,630 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 21 treesize of output 24 [2018-12-24 14:30:24,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:24,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:24,638 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:24,641 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:24,650 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:24,651 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,689 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,709 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,726 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,740 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,753 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,798 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:24,798 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:24,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,860 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:30:24,861 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,903 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:24,904 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:24,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:24,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:30:24,951 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:24,999 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:24,999 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:30:25,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,039 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:25,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:25,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:30:25,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:25,093 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. [2018-12-24 14:30:25,093 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:30:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:25,141 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:25,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:25,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:25,239 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:25,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:25,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:25,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:25,240 INFO L87 Difference]: Start difference. First operand 116 states and 682 transitions. Second operand 10 states. [2018-12-24 14:30:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:25,995 INFO L93 Difference]: Finished difference Result 163 states and 796 transitions. [2018-12-24 14:30:25,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:25,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:25,998 INFO L225 Difference]: With dead ends: 163 [2018-12-24 14:30:25,998 INFO L226 Difference]: Without dead ends: 160 [2018-12-24 14:30:25,999 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:30:26,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-12-24 14:30:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 122. [2018-12-24 14:30:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-12-24 14:30:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 724 transitions. [2018-12-24 14:30:26,024 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 724 transitions. Word has length 5 [2018-12-24 14:30:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:26,025 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 724 transitions. [2018-12-24 14:30:26,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 724 transitions. [2018-12-24 14:30:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:26,026 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:26,026 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:26,026 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash 29179180, now seen corresponding path program 1 times [2018-12-24 14:30:26,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:26,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:26,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:26,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:26,028 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:26,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:26,157 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:26,157 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:26,157 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [27] [2018-12-24 14:30:26,159 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:26,159 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:26,523 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:26,523 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:26,523 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:26,523 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:26,524 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 [2018-12-24 14:30:26,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:26,541 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:26,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:26,731 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:30:26,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,771 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 48 treesize of output 54 [2018-12-24 14:30:26,934 WARN L181 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-12-24 14:30:26,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,941 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 41 treesize of output 53 [2018-12-24 14:30:26,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:26,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:30:27,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:27,031 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,049 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,066 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,084 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:27,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:27,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:27,118 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:27,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:27,128 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:27,128 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,154 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,176 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,192 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,206 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,216 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:27,251 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:27,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,305 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:30:27,305 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,333 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:27,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:27,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:30:27,370 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,402 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:27,402 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:30:27,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,436 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:27,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:27,438 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:30:27,438 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:27,474 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:27,475 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:30:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:27,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:27,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:27,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:27,553 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:27,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:27,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:27,554 INFO L87 Difference]: Start difference. First operand 122 states and 724 transitions. Second operand 10 states. [2018-12-24 14:30:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:28,148 INFO L93 Difference]: Finished difference Result 165 states and 829 transitions. [2018-12-24 14:30:28,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:28,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:28,151 INFO L225 Difference]: With dead ends: 165 [2018-12-24 14:30:28,151 INFO L226 Difference]: Without dead ends: 163 [2018-12-24 14:30:28,152 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:30:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-12-24 14:30:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2018-12-24 14:30:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-12-24 14:30:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 745 transitions. [2018-12-24 14:30:28,177 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 745 transitions. Word has length 5 [2018-12-24 14:30:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:28,177 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 745 transitions. [2018-12-24 14:30:28,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 745 transitions. [2018-12-24 14:30:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:28,178 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:28,178 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:28,178 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:28,178 INFO L82 PathProgramCache]: Analyzing trace with hash 28829936, now seen corresponding path program 1 times [2018-12-24 14:30:28,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:28,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:28,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:28,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:28,179 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:30:28,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:28,214 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:28,214 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:28,215 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [29] [2018-12-24 14:30:28,216 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:28,216 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:28,475 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:28,475 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:28,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:28,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:28,476 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 [2018-12-24 14:30:28,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:28,485 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:28,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:28,520 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 21 treesize of output 24 [2018-12-24 14:30:28,526 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 24 treesize of output 30 [2018-12-24 14:30:28,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,534 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 26 treesize of output 40 [2018-12-24 14:30:28,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:28,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:28,574 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:28,575 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,606 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,629 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,648 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,661 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,675 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,704 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 48 treesize of output 54 [2018-12-24 14:30:28,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,739 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 41 treesize of output 53 [2018-12-24 14:30:28,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,780 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 32 treesize of output 61 [2018-12-24 14:30:28,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:28,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:28,828 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,868 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,884 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,901 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:28,935 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:28,935 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:29,467 WARN L181 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2018-12-24 14:30:29,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,473 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:30:29,474 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:29,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:29,504 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:29,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:29,532 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:29,533 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:30:29,534 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:29,565 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:29,565 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2018-12-24 14:30:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:29,584 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:29,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:29,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2018-12-24 14:30:29,625 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:29,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:30:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:30:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:30:29,626 INFO L87 Difference]: Start difference. First operand 125 states and 745 transitions. Second operand 7 states. [2018-12-24 14:30:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:29,926 INFO L93 Difference]: Finished difference Result 158 states and 796 transitions. [2018-12-24 14:30:29,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:29,927 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2018-12-24 14:30:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:29,929 INFO L225 Difference]: With dead ends: 158 [2018-12-24 14:30:29,929 INFO L226 Difference]: Without dead ends: 156 [2018-12-24 14:30:29,930 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:30:29,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-12-24 14:30:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 128. [2018-12-24 14:30:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-12-24 14:30:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 760 transitions. [2018-12-24 14:30:29,953 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 760 transitions. Word has length 5 [2018-12-24 14:30:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:29,953 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 760 transitions. [2018-12-24 14:30:29,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:30:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 760 transitions. [2018-12-24 14:30:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:29,954 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:29,954 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:29,954 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash 28831546, now seen corresponding path program 2 times [2018-12-24 14:30:29,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:29,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:29,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:29,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:29,956 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:30,583 WARN L181 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-12-24 14:30:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:30,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:30,612 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:30,612 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:30:30,612 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:30:30,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:30,612 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 [2018-12-24 14:30:30,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:30:30,623 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:30:30,629 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:30:30,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:30:30,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:30,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:30,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,700 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:30,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,745 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:30,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,803 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:30,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:30,876 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:30,877 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:30,906 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:30,934 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:30,962 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:30,991 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,028 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 21 treesize of output 24 [2018-12-24 14:30:31,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:31,034 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:31,038 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:31,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:31,046 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:31,046 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,084 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,105 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,122 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,135 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,148 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,195 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:31,195 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:31,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:31,227 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:31,275 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:31,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,310 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:30:31,311 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,361 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:31,362 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:30:31,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:31,400 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:31,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:30:31,401 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:31,454 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. [2018-12-24 14:30:31,454 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:30:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:31,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:31,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:31,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2018-12-24 14:30:31,519 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:31,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:31,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:30:31,520 INFO L87 Difference]: Start difference. First operand 128 states and 760 transitions. Second operand 10 states. [2018-12-24 14:30:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:32,268 INFO L93 Difference]: Finished difference Result 241 states and 1191 transitions. [2018-12-24 14:30:32,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:30:32,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:32,272 INFO L225 Difference]: With dead ends: 241 [2018-12-24 14:30:32,272 INFO L226 Difference]: Without dead ends: 235 [2018-12-24 14:30:32,272 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:30:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-12-24 14:30:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 164. [2018-12-24 14:30:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-12-24 14:30:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 1007 transitions. [2018-12-24 14:30:32,311 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 1007 transitions. Word has length 5 [2018-12-24 14:30:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:32,311 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 1007 transitions. [2018-12-24 14:30:32,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 1007 transitions. [2018-12-24 14:30:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:32,313 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:32,313 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:32,313 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash 28831858, now seen corresponding path program 1 times [2018-12-24 14:30:32,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:32,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:32,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:30:32,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:32,315 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:30:32,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:32,722 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:32,722 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:32,722 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [29] [2018-12-24 14:30:32,723 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:32,723 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:33,069 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:33,069 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:33,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:33,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:33,070 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 [2018-12-24 14:30:33,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:33,079 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:33,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:33,151 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 21 treesize of output 24 [2018-12-24 14:30:33,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:33,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,162 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:33,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,174 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 28 treesize of output 54 [2018-12-24 14:30:33,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,186 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 30 treesize of output 72 [2018-12-24 14:30:33,197 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:33,198 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,228 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,249 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,290 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,301 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,315 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,344 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 48 treesize of output 54 [2018-12-24 14:30:33,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,378 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:30:33,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,418 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 32 treesize of output 61 [2018-12-24 14:30:33,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:33,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:33,492 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,509 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,526 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,543 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:33,576 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:33,577 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:33,850 WARN L181 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:30:34,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,032 INFO L303 Elim1Store]: Index analysis took 177 ms [2018-12-24 14:30:34,041 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:30:34,042 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:30:34,153 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:30:34,153 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:106 [2018-12-24 14:30:34,398 WARN L181 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-12-24 14:30:34,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,408 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:34,409 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2018-12-24 14:30:34,410 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:34,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:34,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2018-12-24 14:30:34,536 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2018-12-24 14:30:34,897 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:30:34,897 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:126, output treesize:280 [2018-12-24 14:30:35,138 WARN L181 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 90 [2018-12-24 14:30:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:35,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:35,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:35,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:35,338 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:35,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:35,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:35,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:35,339 INFO L87 Difference]: Start difference. First operand 164 states and 1007 transitions. Second operand 8 states. [2018-12-24 14:30:35,863 WARN L181 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-12-24 14:30:36,400 WARN L181 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2018-12-24 14:30:36,687 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2018-12-24 14:30:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:36,985 INFO L93 Difference]: Finished difference Result 208 states and 1150 transitions. [2018-12-24 14:30:36,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:36,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:30:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:36,989 INFO L225 Difference]: With dead ends: 208 [2018-12-24 14:30:36,989 INFO L226 Difference]: Without dead ends: 207 [2018-12-24 14:30:36,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:36,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-12-24 14:30:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 181. [2018-12-24 14:30:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-12-24 14:30:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 1128 transitions. [2018-12-24 14:30:37,034 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 1128 transitions. Word has length 5 [2018-12-24 14:30:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:37,034 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 1128 transitions. [2018-12-24 14:30:37,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 1128 transitions. [2018-12-24 14:30:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:37,035 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:37,035 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:37,036 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:37,036 INFO L82 PathProgramCache]: Analyzing trace with hash 28818278, now seen corresponding path program 1 times [2018-12-24 14:30:37,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:37,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:37,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:37,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:37,037 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:37,422 WARN L181 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2018-12-24 14:30:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:37,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:37,461 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:37,461 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:37,461 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [27] [2018-12-24 14:30:37,462 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:37,462 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:37,949 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:37,949 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:37,950 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:37,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:37,950 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 [2018-12-24 14:30:37,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:37,961 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:37,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:38,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,041 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 48 treesize of output 54 [2018-12-24 14:30:38,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,086 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 41 treesize of output 53 [2018-12-24 14:30:38,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,129 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 32 treesize of output 61 [2018-12-24 14:30:38,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:38,179 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,196 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,212 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,229 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:38,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:38,261 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:38,263 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:38,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:38,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:38,277 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,305 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,326 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,343 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,354 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,366 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:38,400 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:38,400 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:38,678 WARN L181 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:30:38,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:38,699 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:30:38,701 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:30:38,813 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2018-12-24 14:30:38,814 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2018-12-24 14:30:39,111 WARN L181 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-12-24 14:30:39,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,140 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 103 [2018-12-24 14:30:39,141 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:30:39,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,322 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 89 [2018-12-24 14:30:39,323 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:39,413 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2018-12-24 14:30:39,413 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:129, output treesize:125 [2018-12-24 14:30:39,674 WARN L181 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-12-24 14:30:39,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:39,714 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:39,738 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 118 [2018-12-24 14:30:39,740 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:30:40,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,054 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,060 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:40,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2018-12-24 14:30:40,063 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:40,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:40,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 110 [2018-12-24 14:30:40,233 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:40,395 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:30:40,396 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:242 [2018-12-24 14:30:40,532 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 84 [2018-12-24 14:30:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:40,534 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:40,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:40,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:30:40,638 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:40,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:40,639 INFO L87 Difference]: Start difference. First operand 181 states and 1128 transitions. Second operand 10 states. [2018-12-24 14:30:41,383 WARN L181 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2018-12-24 14:30:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:41,988 INFO L93 Difference]: Finished difference Result 280 states and 1534 transitions. [2018-12-24 14:30:41,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:30:41,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:41,993 INFO L225 Difference]: With dead ends: 280 [2018-12-24 14:30:41,994 INFO L226 Difference]: Without dead ends: 279 [2018-12-24 14:30:41,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:30:41,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-12-24 14:30:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 185. [2018-12-24 14:30:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-12-24 14:30:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 1156 transitions. [2018-12-24 14:30:42,039 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 1156 transitions. Word has length 5 [2018-12-24 14:30:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:42,040 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 1156 transitions. [2018-12-24 14:30:42,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 1156 transitions. [2018-12-24 14:30:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:42,040 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:42,041 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:42,041 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash 28835766, now seen corresponding path program 1 times [2018-12-24 14:30:42,041 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:42,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:42,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:42,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:42,042 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:30:42,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:30:42,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-24 14:30:42,150 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:30:42,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-24 14:30:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-24 14:30:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-24 14:30:42,151 INFO L87 Difference]: Start difference. First operand 185 states and 1156 transitions. Second operand 4 states. [2018-12-24 14:30:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:42,248 INFO L93 Difference]: Finished difference Result 201 states and 1179 transitions. [2018-12-24 14:30:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:30:42,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-12-24 14:30:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:42,251 INFO L225 Difference]: With dead ends: 201 [2018-12-24 14:30:42,252 INFO L226 Difference]: Without dead ends: 198 [2018-12-24 14:30:42,252 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:30:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-12-24 14:30:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2018-12-24 14:30:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-12-24 14:30:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 1164 transitions. [2018-12-24 14:30:42,299 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 1164 transitions. Word has length 5 [2018-12-24 14:30:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:42,300 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 1164 transitions. [2018-12-24 14:30:42,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-24 14:30:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 1164 transitions. [2018-12-24 14:30:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:42,301 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:42,301 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:42,301 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:42,302 INFO L82 PathProgramCache]: Analyzing trace with hash 28822248, now seen corresponding path program 1 times [2018-12-24 14:30:42,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:42,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:42,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:42,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:42,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:30:42,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:42,378 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:42,378 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:42,379 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [29] [2018-12-24 14:30:42,379 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:42,379 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:42,654 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:42,654 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:42,654 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:42,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:42,654 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:42,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:42,664 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:42,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:42,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,705 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:30:42,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,744 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:30:42,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,787 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 32 treesize of output 61 [2018-12-24 14:30:42,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,839 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:42,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:42,842 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:42,866 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:42,888 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:42,934 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:42,966 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:42,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:42,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:42,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:42,977 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:42,985 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:42,985 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,012 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,033 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,049 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,063 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,075 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,108 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:43,109 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:43,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,146 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:30:43,147 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:43,177 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:43,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:43,206 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:43,207 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:30:43,207 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:43,238 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:43,238 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:42 [2018-12-24 14:30:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:43,256 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:43,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:43,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:43,299 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:43,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:43,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:43,299 INFO L87 Difference]: Start difference. First operand 187 states and 1164 transitions. Second operand 8 states. [2018-12-24 14:30:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:43,625 INFO L93 Difference]: Finished difference Result 208 states and 1202 transitions. [2018-12-24 14:30:43,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:43,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:30:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:43,628 INFO L225 Difference]: With dead ends: 208 [2018-12-24 14:30:43,628 INFO L226 Difference]: Without dead ends: 207 [2018-12-24 14:30:43,628 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-12-24 14:30:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2018-12-24 14:30:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-12-24 14:30:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 1178 transitions. [2018-12-24 14:30:43,676 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 1178 transitions. Word has length 5 [2018-12-24 14:30:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:43,677 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 1178 transitions. [2018-12-24 14:30:43,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 1178 transitions. [2018-12-24 14:30:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:43,678 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:43,678 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:43,678 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash 29302748, now seen corresponding path program 1 times [2018-12-24 14:30:43,679 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:43,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:43,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:43,680 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:43,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:43,733 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:43,733 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:43,734 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [29] [2018-12-24 14:30:43,736 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:43,736 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:44,013 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:44,013 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:44,014 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:44,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:44,014 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:44,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:44,024 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:44,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:44,034 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 43 treesize of output 39 [2018-12-24 14:30:44,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:30:44,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,119 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 32 treesize of output 57 [2018-12-24 14:30:44,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,162 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,170 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:30:44,171 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,192 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,214 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,236 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:44,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:30:44,275 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:30:44,316 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:30:44,356 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:30:44,414 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:30:44,415 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,441 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,459 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,475 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,487 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,500 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:44,532 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:30:44,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,574 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:30:44,575 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,604 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:44,604 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:30:44,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:44,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 74 [2018-12-24 14:30:44,635 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:44,663 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:44,663 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:34 [2018-12-24 14:30:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:44,681 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:44,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:44,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:44,724 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:44,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:44,725 INFO L87 Difference]: Start difference. First operand 189 states and 1178 transitions. Second operand 8 states. [2018-12-24 14:30:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:45,039 INFO L93 Difference]: Finished difference Result 210 states and 1196 transitions. [2018-12-24 14:30:45,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:45,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:30:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:45,042 INFO L225 Difference]: With dead ends: 210 [2018-12-24 14:30:45,043 INFO L226 Difference]: Without dead ends: 208 [2018-12-24 14:30:45,043 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-12-24 14:30:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 191. [2018-12-24 14:30:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-12-24 14:30:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 1179 transitions. [2018-12-24 14:30:45,091 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 1179 transitions. Word has length 5 [2018-12-24 14:30:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:45,092 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 1179 transitions. [2018-12-24 14:30:45,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 1179 transitions. [2018-12-24 14:30:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:45,092 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:45,092 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:45,093 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 29308202, now seen corresponding path program 2 times [2018-12-24 14:30:45,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:45,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:45,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:45,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:45,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:45,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:45,201 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:45,201 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:30:45,201 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:30:45,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:45,201 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:45,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:30:45,214 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:30:45,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:30:45,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:30:45,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:45,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,252 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:45,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,291 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:45,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,342 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:45,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,396 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,398 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:30:45,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:45,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:45,483 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,514 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,543 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,575 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,613 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:45,665 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 21 treesize of output 24 [2018-12-24 14:30:45,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:30:45,672 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:45,675 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:45,679 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:45,688 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:45,689 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,038 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,059 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,076 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,090 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,103 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,149 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:46,150 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:46,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,188 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:46,188 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,235 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:46,235 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:46,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,278 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:30:46,278 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:46,331 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:30:46,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:46,371 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:46,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2018-12-24 14:30:46,373 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:46,427 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. [2018-12-24 14:30:46,428 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:30:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:46,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:46,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:46,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:46,513 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:46,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:46,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:46,514 INFO L87 Difference]: Start difference. First operand 191 states and 1179 transitions. Second operand 10 states. [2018-12-24 14:30:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:48,254 INFO L93 Difference]: Finished difference Result 242 states and 1308 transitions. [2018-12-24 14:30:48,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:48,254 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:48,258 INFO L225 Difference]: With dead ends: 242 [2018-12-24 14:30:48,258 INFO L226 Difference]: Without dead ends: 240 [2018-12-24 14:30:48,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:30:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-12-24 14:30:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-12-24 14:30:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-12-24 14:30:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 1251 transitions. [2018-12-24 14:30:48,299 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 1251 transitions. Word has length 5 [2018-12-24 14:30:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:48,300 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 1251 transitions. [2018-12-24 14:30:48,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 1251 transitions. [2018-12-24 14:30:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:48,300 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:48,301 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:48,301 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash 29307954, now seen corresponding path program 1 times [2018-12-24 14:30:48,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:48,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:48,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:30:48,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:48,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:48,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:48,373 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:48,373 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:48,374 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [27] [2018-12-24 14:30:48,377 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:48,377 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:48,805 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:48,805 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:48,805 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:48,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:48,806 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:48,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:48,815 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:48,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:48,859 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:48,863 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 24 treesize of output 30 [2018-12-24 14:30:48,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,873 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 26 treesize of output 40 [2018-12-24 14:30:48,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,886 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 28 treesize of output 54 [2018-12-24 14:30:48,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,899 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:48,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:48,911 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:30:48,911 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:48,954 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:48,978 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:48,998 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,012 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,026 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,065 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:30:49,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,106 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:30:49,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,154 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:30:49,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,212 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 37 treesize of output 80 [2018-12-24 14:30:49,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,288 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:30:49,289 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,314 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,341 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,368 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,394 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,442 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:49,443 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:30:49,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,479 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:30:49,479 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,526 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:49,527 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:30:49,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,564 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:30:49,564 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,614 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:49,614 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:55 [2018-12-24 14:30:49,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:49,687 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:49,688 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 134 [2018-12-24 14:30:49,689 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:49,753 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. [2018-12-24 14:30:49,754 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:30:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:49,776 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:49,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:49,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:49,842 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:49,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:49,842 INFO L87 Difference]: Start difference. First operand 202 states and 1251 transitions. Second operand 10 states. [2018-12-24 14:30:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:50,513 INFO L93 Difference]: Finished difference Result 249 states and 1369 transitions. [2018-12-24 14:30:50,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:50,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:50,517 INFO L225 Difference]: With dead ends: 249 [2018-12-24 14:30:50,517 INFO L226 Difference]: Without dead ends: 247 [2018-12-24 14:30:50,517 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:30:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-12-24 14:30:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2018-12-24 14:30:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-12-24 14:30:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 1326 transitions. [2018-12-24 14:30:50,561 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 1326 transitions. Word has length 5 [2018-12-24 14:30:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:50,561 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 1326 transitions. [2018-12-24 14:30:50,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 1326 transitions. [2018-12-24 14:30:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:50,562 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:50,562 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:50,562 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash 29294624, now seen corresponding path program 1 times [2018-12-24 14:30:50,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:50,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:50,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:50,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:50,564 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:50,746 WARN L181 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2018-12-24 14:30:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:50,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:50,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:50,798 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:50,798 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [27] [2018-12-24 14:30:50,801 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:50,801 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:51,138 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:51,139 INFO L272 AbstractInterpreter]: Visited 5 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:30:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:51,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:51,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:51,139 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:51,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:51,148 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:51,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:51,180 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:30:51,185 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 24 treesize of output 30 [2018-12-24 14:30:51,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,193 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:30:51,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:30:51,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,214 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:30:51,229 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:30:51,230 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,264 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,288 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,307 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,322 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,336 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,365 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 48 treesize of output 54 [2018-12-24 14:30:51,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,399 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 41 treesize of output 53 [2018-12-24 14:30:51,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,439 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 32 treesize of output 61 [2018-12-24 14:30:51,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,491 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:30:51,491 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,547 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,564 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,581 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,614 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:51,615 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:30:51,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,675 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:30:51,676 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,705 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:51,706 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:30:51,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,741 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:30:51,741 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,773 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:51,774 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2018-12-24 14:30:51,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:51,811 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:51,812 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:30:51,813 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:51,872 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:51,873 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:30:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:51,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:51,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:51,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:30:51,957 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:51,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:30:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:30:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:30:51,958 INFO L87 Difference]: Start difference. First operand 212 states and 1326 transitions. Second operand 10 states. [2018-12-24 14:30:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:52,537 INFO L93 Difference]: Finished difference Result 260 states and 1437 transitions. [2018-12-24 14:30:52,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:30:52,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:30:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:52,541 INFO L225 Difference]: With dead ends: 260 [2018-12-24 14:30:52,541 INFO L226 Difference]: Without dead ends: 258 [2018-12-24 14:30:52,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:30:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-12-24 14:30:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2018-12-24 14:30:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-12-24 14:30:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2018-12-24 14:30:52,585 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2018-12-24 14:30:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:52,586 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2018-12-24 14:30:52,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:30:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2018-12-24 14:30:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:52,587 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:52,587 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:52,587 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:52,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:52,587 INFO L82 PathProgramCache]: Analyzing trace with hash 29298904, now seen corresponding path program 1 times [2018-12-24 14:30:52,587 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:52,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:52,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:52,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:52,588 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:52,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:52,675 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:52,675 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:52,675 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [28], [29] [2018-12-24 14:30:52,676 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:52,676 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:52,930 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:52,931 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:52,931 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:52,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:52,931 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:52,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:52,939 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:52,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:52,953 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 21 treesize of output 24 [2018-12-24 14:30:52,960 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 24 treesize of output 26 [2018-12-24 14:30:52,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,970 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:30:52,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:30:52,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:52,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,002 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,003 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:30:53,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,018 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:30:53,019 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,059 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,099 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,113 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,128 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,157 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:30:53,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,178 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 53 treesize of output 63 [2018-12-24 14:30:53,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:30:53,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:30:53,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,351 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:30:53,352 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,378 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,403 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,429 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,456 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,517 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:53,518 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:30:53,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:30:53,547 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,592 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:53,592 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:30:53,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,618 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:53,619 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:53,620 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 101 [2018-12-24 14:30:53,621 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:53,667 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. [2018-12-24 14:30:53,667 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:55 [2018-12-24 14:30:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:53,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:53,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:53,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:53,733 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:53,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:53,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:53,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:53,733 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2018-12-24 14:30:54,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:30:54,056 INFO L93 Difference]: Finished difference Result 244 states and 1417 transitions. [2018-12-24 14:30:54,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:30:54,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:30:54,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:30:54,060 INFO L225 Difference]: With dead ends: 244 [2018-12-24 14:30:54,060 INFO L226 Difference]: Without dead ends: 243 [2018-12-24 14:30:54,060 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:30:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-12-24 14:30:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-12-24 14:30:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-12-24 14:30:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 1389 transitions. [2018-12-24 14:30:54,107 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 1389 transitions. Word has length 5 [2018-12-24 14:30:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:30:54,108 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 1389 transitions. [2018-12-24 14:30:54,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:30:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 1389 transitions. [2018-12-24 14:30:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:30:54,109 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:30:54,109 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:30:54,109 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:30:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash 29366174, now seen corresponding path program 1 times [2018-12-24 14:30:54,109 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:30:54,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:54,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:54,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:30:54,110 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:30:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:54,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:54,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:30:54,182 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:30:54,182 INFO L207 CegarAbsIntRunner]: [0], [22], [24], [28], [29] [2018-12-24 14:30:54,183 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:30:54,183 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:30:54,447 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:30:54,447 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:30:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:30:54,448 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:30:54,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:30:54,448 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:30:54,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:30:54,456 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:30:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:30:54,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:30:54,466 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 21 treesize of output 24 [2018-12-24 14:30:54,470 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 24 treesize of output 26 [2018-12-24 14:30:54,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,480 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:30:54,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,497 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 28 treesize of output 50 [2018-12-24 14:30:54,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,510 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 30 treesize of output 68 [2018-12-24 14:30:54,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:30:54,529 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,564 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,586 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,603 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,617 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,631 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,656 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 43 treesize of output 39 [2018-12-24 14:30:54,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,672 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 36 treesize of output 49 [2018-12-24 14:30:54,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,710 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:30:54,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:54,764 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:30:54,765 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,780 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,795 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,811 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:30:54,843 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:30:54,843 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:30:55,071 WARN L181 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-12-24 14:30:55,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:30:55,135 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2018-12-24 14:30:55,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2018-12-24 14:30:55,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:373 [2018-12-24 14:30:55,864 WARN L181 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 80 [2018-12-24 14:30:55,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,882 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,886 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 92 [2018-12-24 14:30:55,887 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:55,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:55,995 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2018-12-24 14:30:55,996 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:56,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:56,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:56,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:56,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:56,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:30:56,085 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:30:56,086 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 76 [2018-12-24 14:30:56,086 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:30:56,160 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2018-12-24 14:30:56,160 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:174, output treesize:126 [2018-12-24 14:30:58,286 WARN L181 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 79 [2018-12-24 14:30:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:58,290 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:30:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:30:58,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:30:58,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:30:58,347 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:30:58,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:30:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:30:58,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:30:58,348 INFO L87 Difference]: Start difference. First operand 221 states and 1389 transitions. Second operand 8 states. [2018-12-24 14:30:58,853 WARN L181 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-12-24 14:30:59,224 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2018-12-24 14:31:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:01,736 INFO L93 Difference]: Finished difference Result 273 states and 1446 transitions. [2018-12-24 14:31:01,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:31:01,736 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:31:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:01,740 INFO L225 Difference]: With dead ends: 273 [2018-12-24 14:31:01,740 INFO L226 Difference]: Without dead ends: 272 [2018-12-24 14:31:01,741 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:31:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2018-12-24 14:31:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 222. [2018-12-24 14:31:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-12-24 14:31:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 1396 transitions. [2018-12-24 14:31:01,781 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 1396 transitions. Word has length 5 [2018-12-24 14:31:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:01,781 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 1396 transitions. [2018-12-24 14:31:01,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 1396 transitions. [2018-12-24 14:31:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:31:01,782 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:01,782 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:31:01,782 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 29353958, now seen corresponding path program 2 times [2018-12-24 14:31:01,783 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:01,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:01,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:01,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:01,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:01,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:01,896 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:01,896 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:31:01,896 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:31:01,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:01,897 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:01,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:31:01,907 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:31:01,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:31:01,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:31:01,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:01,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:01,946 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 24 treesize of output 30 [2018-12-24 14:31:01,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,952 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 26 treesize of output 40 [2018-12-24 14:31:01,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,961 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 28 treesize of output 54 [2018-12-24 14:31:01,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,969 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 30 treesize of output 72 [2018-12-24 14:31:01,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:01,983 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:01,983 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,025 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,048 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,067 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,080 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,094 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:02,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,168 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:02,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:02,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:02,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,348 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,349 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,350 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:02,351 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,378 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,404 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,431 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,458 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,505 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:02,505 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:02,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:31:02,536 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,582 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:02,583 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:02,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,613 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:02,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:31:02,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,665 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. [2018-12-24 14:31:02,665 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:83, output treesize:59 [2018-12-24 14:31:02,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,694 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:02,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:31:02,705 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:02,753 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. [2018-12-24 14:31:02,754 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2018-12-24 14:31:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:02,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:02,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:02,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:31:02,820 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:02,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:02,821 INFO L87 Difference]: Start difference. First operand 222 states and 1396 transitions. Second operand 10 states. [2018-12-24 14:31:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:03,626 INFO L93 Difference]: Finished difference Result 274 states and 1519 transitions. [2018-12-24 14:31:03,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:31:03,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:31:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:03,631 INFO L225 Difference]: With dead ends: 274 [2018-12-24 14:31:03,631 INFO L226 Difference]: Without dead ends: 273 [2018-12-24 14:31:03,632 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-12-24 14:31:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 225. [2018-12-24 14:31:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-12-24 14:31:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2018-12-24 14:31:03,679 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2018-12-24 14:31:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:03,680 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2018-12-24 14:31:03,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2018-12-24 14:31:03,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:31:03,681 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:03,681 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:31:03,681 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:03,682 INFO L82 PathProgramCache]: Analyzing trace with hash 29372004, now seen corresponding path program 1 times [2018-12-24 14:31:03,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:03,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:03,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:31:03,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:03,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:03,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:03,861 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:03,861 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:31:03,862 INFO L207 CegarAbsIntRunner]: [0], [24], [28], [30], [31] [2018-12-24 14:31:03,862 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:03,863 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:05,748 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:05,748 INFO L272 AbstractInterpreter]: Visited 5 different actions 13 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. [2018-12-24 14:31:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:05,749 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:05,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:05,749 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:05,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:05,758 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:05,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:05,769 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 63 treesize of output 56 [2018-12-24 14:31:05,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:31:05,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,851 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:31:05,898 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,906 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 37 treesize of output 76 [2018-12-24 14:31:05,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:05,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:31:05,976 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,002 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,028 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,054 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,082 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:06,127 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:31:06,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:31:06,139 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:31:06,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:31:06,156 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:31:06,157 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,211 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,237 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,258 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,273 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,290 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,344 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. [2018-12-24 14:31:06,344 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2018-12-24 14:31:06,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:06,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:31:06,370 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:06,422 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. [2018-12-24 14:31:06,422 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:97, output treesize:67 [2018-12-24 14:31:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:06,440 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:06,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:06,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2018-12-24 14:31:06,470 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:06,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-24 14:31:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-24 14:31:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-12-24 14:31:06,471 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 6 states. [2018-12-24 14:31:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:06,699 INFO L93 Difference]: Finished difference Result 242 states and 1433 transitions. [2018-12-24 14:31:06,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-24 14:31:06,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-12-24 14:31:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:06,702 INFO L225 Difference]: With dead ends: 242 [2018-12-24 14:31:06,703 INFO L226 Difference]: Without dead ends: 241 [2018-12-24 14:31:06,703 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-12-24 14:31:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-12-24 14:31:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2018-12-24 14:31:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-12-24 14:31:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 1417 transitions. [2018-12-24 14:31:06,747 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 1417 transitions. Word has length 5 [2018-12-24 14:31:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:06,747 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 1417 transitions. [2018-12-24 14:31:06,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-24 14:31:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 1417 transitions. [2018-12-24 14:31:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:31:06,748 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:06,748 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:31:06,748 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash 29357926, now seen corresponding path program 1 times [2018-12-24 14:31:06,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:06,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:06,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:06,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:06,749 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:06,941 WARN L181 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2018-12-24 14:31:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:06,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:06,975 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:06,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:31:06,976 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [24], [27] [2018-12-24 14:31:06,977 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:06,977 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:07,788 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:07,788 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. [2018-12-24 14:31:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:07,788 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:07,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:07,788 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:07,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:07,797 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:07,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:07,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,842 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:07,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:07,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,937 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:07,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:07,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:08,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:08,073 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,101 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,129 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,157 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,185 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,222 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 21 treesize of output 24 [2018-12-24 14:31:08,225 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:08,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:31:08,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:08,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:31:08,237 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:08,238 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,276 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,298 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,313 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,327 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,340 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,387 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:08,387 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:08,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,431 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:31:08,431 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,478 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:08,478 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:08,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:31:08,518 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,568 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:08,569 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:31:08,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:08,608 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:08,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 128 [2018-12-24 14:31:08,609 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:08,662 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. [2018-12-24 14:31:08,662 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:47 [2018-12-24 14:31:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:08,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:08,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:08,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:08,745 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:08,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:08,746 INFO L87 Difference]: Start difference. First operand 225 states and 1417 transitions. Second operand 10 states. [2018-12-24 14:31:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:09,406 INFO L93 Difference]: Finished difference Result 276 states and 1527 transitions. [2018-12-24 14:31:09,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:09,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2018-12-24 14:31:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:09,411 INFO L225 Difference]: With dead ends: 276 [2018-12-24 14:31:09,411 INFO L226 Difference]: Without dead ends: 274 [2018-12-24 14:31:09,412 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-12-24 14:31:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 234. [2018-12-24 14:31:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-12-24 14:31:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1480 transitions. [2018-12-24 14:31:09,463 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1480 transitions. Word has length 5 [2018-12-24 14:31:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:09,463 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 1480 transitions. [2018-12-24 14:31:09,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1480 transitions. [2018-12-24 14:31:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:31:09,464 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:09,464 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:31:09,465 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash 28933724, now seen corresponding path program 1 times [2018-12-24 14:31:09,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:09,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:09,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:09,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:09,466 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:09,687 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-12-24 14:31:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:09,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:09,815 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:09,815 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:31:09,815 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [29] [2018-12-24 14:31:09,816 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:09,816 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:10,111 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:10,112 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:31:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:10,112 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:10,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:10,112 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:10,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:10,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:10,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:10,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,148 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 48 treesize of output 54 [2018-12-24 14:31:10,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,202 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 41 treesize of output 53 [2018-12-24 14:31:10,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,243 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 32 treesize of output 61 [2018-12-24 14:31:10,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,295 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:31:10,296 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,313 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,328 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,343 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:10,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:10,372 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:31:10,375 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:10,378 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 30 treesize of output 72 [2018-12-24 14:31:10,386 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:31:10,386 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,414 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,435 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,451 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,465 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,477 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,511 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. [2018-12-24 14:31:10,511 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:31:10,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,604 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:31:10,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:10,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:31:10,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:10,931 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:31:10,932 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:10,966 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:10,966 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:40 [2018-12-24 14:31:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:10,983 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:11,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:11,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:31:11,022 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:11,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:11,022 INFO L87 Difference]: Start difference. First operand 234 states and 1480 transitions. Second operand 8 states. [2018-12-24 14:31:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:11,505 INFO L93 Difference]: Finished difference Result 288 states and 1635 transitions. [2018-12-24 14:31:11,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:11,505 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:31:11,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:11,508 INFO L225 Difference]: With dead ends: 288 [2018-12-24 14:31:11,509 INFO L226 Difference]: Without dead ends: 287 [2018-12-24 14:31:11,509 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:31:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-12-24 14:31:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2018-12-24 14:31:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-12-24 14:31:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 1595 transitions. [2018-12-24 14:31:11,572 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 1595 transitions. Word has length 5 [2018-12-24 14:31:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:11,572 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 1595 transitions. [2018-12-24 14:31:11,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 1595 transitions. [2018-12-24 14:31:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-12-24 14:31:11,573 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:11,573 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-12-24 14:31:11,573 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash 28941412, now seen corresponding path program 1 times [2018-12-24 14:31:11,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:11,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:11,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:11,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:11,575 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:11,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:11,659 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:11,659 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 6 with the following transitions: [2018-12-24 14:31:11,659 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [28], [29] [2018-12-24 14:31:11,660 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:11,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:11,925 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:11,926 INFO L272 AbstractInterpreter]: Visited 5 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:31:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:11,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:11,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:11,926 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:11,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:11,934 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:11,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:11,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:11,951 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 24 treesize of output 26 [2018-12-24 14:31:11,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,968 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 26 treesize of output 36 [2018-12-24 14:31:11,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,982 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 28 treesize of output 50 [2018-12-24 14:31:11,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:11,996 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 30 treesize of output 68 [2018-12-24 14:31:12,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:31:12,011 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,039 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,059 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,076 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,088 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,102 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,126 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 43 treesize of output 39 [2018-12-24 14:31:12,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,144 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 36 treesize of output 49 [2018-12-24 14:31:12,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,181 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 32 treesize of output 57 [2018-12-24 14:31:12,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:31:12,230 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,244 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,259 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,276 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,307 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. [2018-12-24 14:31:12,308 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:31:12,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,347 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:31:12,348 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:31:12,443 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:31:12,443 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:92 [2018-12-24 14:31:12,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:12,510 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 67 [2018-12-24 14:31:12,511 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:12,531 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:12,531 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:27 [2018-12-24 14:31:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:12,545 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:12,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:12,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:31:12,577 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:12,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:31:12,578 INFO L87 Difference]: Start difference. First operand 250 states and 1595 transitions. Second operand 8 states. [2018-12-24 14:31:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:12,987 INFO L93 Difference]: Finished difference Result 319 states and 1823 transitions. [2018-12-24 14:31:12,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:31:12,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2018-12-24 14:31:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:12,992 INFO L225 Difference]: With dead ends: 319 [2018-12-24 14:31:12,992 INFO L226 Difference]: Without dead ends: 318 [2018-12-24 14:31:12,992 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-12-24 14:31:13,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2018-12-24 14:31:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-12-24 14:31:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2018-12-24 14:31:13,063 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 5 [2018-12-24 14:31:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:13,064 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2018-12-24 14:31:13,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2018-12-24 14:31:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:13,065 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:13,065 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:31:13,065 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash 904691166, now seen corresponding path program 1 times [2018-12-24 14:31:13,065 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:13,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:13,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:13,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:13,066 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:13,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:13,177 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:13,177 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:13,178 INFO L207 CegarAbsIntRunner]: [0], [18], [28], [30], [31] [2018-12-24 14:31:13,178 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:13,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:13,351 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:13,351 INFO L272 AbstractInterpreter]: Visited 5 different actions 7 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:31:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:13,352 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:13,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:13,352 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:13,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:13,362 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:13,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:13,372 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 43 treesize of output 39 [2018-12-24 14:31:13,397 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,402 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:31:13,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,450 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,451 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 32 treesize of output 57 [2018-12-24 14:31:13,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,500 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:31:13,501 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,522 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,543 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,569 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,598 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:13,604 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:31:13,609 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:31:13,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:31:13,617 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 30 treesize of output 68 [2018-12-24 14:31:13,628 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:31:13,628 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,654 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,674 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,690 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,702 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,715 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,747 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. [2018-12-24 14:31:13,747 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:31:13,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,807 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:31:13,807 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,835 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:13,836 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:31:13,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:13,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 74 [2018-12-24 14:31:13,863 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:13,895 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:13,895 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:46 [2018-12-24 14:31:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:13,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:13,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:13,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2018-12-24 14:31:13,952 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:13,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:31:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:31:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:31:13,953 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 7 states. [2018-12-24 14:31:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:14,180 INFO L93 Difference]: Finished difference Result 290 states and 1801 transitions. [2018-12-24 14:31:14,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:31:14,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-12-24 14:31:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:14,185 INFO L225 Difference]: With dead ends: 290 [2018-12-24 14:31:14,185 INFO L226 Difference]: Without dead ends: 289 [2018-12-24 14:31:14,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-12-24 14:31:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 276. [2018-12-24 14:31:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-12-24 14:31:14,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 1782 transitions. [2018-12-24 14:31:14,250 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 1782 transitions. Word has length 6 [2018-12-24 14:31:14,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:14,250 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 1782 transitions. [2018-12-24 14:31:14,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:31:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 1782 transitions. [2018-12-24 14:31:14,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:14,252 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:14,252 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-12-24 14:31:14,252 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash 904323688, now seen corresponding path program 3 times [2018-12-24 14:31:14,253 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:14,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:14,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:14,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:14,254 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:14,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:14,373 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:14,373 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:31:14,373 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:31:14,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:14,373 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:14,382 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:31:14,383 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:31:14,388 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:31:14,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:31:14,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:14,411 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 21 treesize of output 24 [2018-12-24 14:31:14,420 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 24 treesize of output 30 [2018-12-24 14:31:14,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,426 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 26 treesize of output 40 [2018-12-24 14:31:14,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,440 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,442 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:14,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:31:14,468 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:31:14,468 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,498 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,522 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,541 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,554 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,568 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,597 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 48 treesize of output 54 [2018-12-24 14:31:14,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,632 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:31:14,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:31:14,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,718 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,719 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,723 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:31:14,724 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,748 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,765 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,862 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,894 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. [2018-12-24 14:31:14,895 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:72, output treesize:71 [2018-12-24 14:31:14,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,926 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:31:14,927 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:14,955 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:14,955 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:31:14,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,979 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,980 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:14,981 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:31:14,982 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:15,017 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:15,017 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:31:15,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:31:15,051 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:15,091 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:15,091 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2018-12-24 14:31:15,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:15,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:31:15,129 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:15,167 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:15,168 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:38 [2018-12-24 14:31:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:15,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:15,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:15,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:31:15,240 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:15,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:31:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:31:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:31:15,240 INFO L87 Difference]: Start difference. First operand 276 states and 1782 transitions. Second operand 11 states. [2018-12-24 14:31:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:15,832 INFO L93 Difference]: Finished difference Result 423 states and 2543 transitions. [2018-12-24 14:31:15,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:31:15,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:31:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:15,838 INFO L225 Difference]: With dead ends: 423 [2018-12-24 14:31:15,839 INFO L226 Difference]: Without dead ends: 421 [2018-12-24 14:31:15,839 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2018-12-24 14:31:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 325. [2018-12-24 14:31:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-12-24 14:31:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 2130 transitions. [2018-12-24 14:31:15,946 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 2130 transitions. Word has length 6 [2018-12-24 14:31:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:15,946 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 2130 transitions. [2018-12-24 14:31:15,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:31:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 2130 transitions. [2018-12-24 14:31:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:15,948 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:15,948 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:15,948 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash 904327844, now seen corresponding path program 1 times [2018-12-24 14:31:15,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:15,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:15,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:31:15,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:15,949 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:16,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:16,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:16,031 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:16,031 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [28], [29] [2018-12-24 14:31:16,032 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:16,032 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:16,390 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:16,391 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:16,391 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:16,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:16,391 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:16,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:16,404 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:16,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:16,442 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 21 treesize of output 24 [2018-12-24 14:31:16,445 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 24 treesize of output 30 [2018-12-24 14:31:16,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,453 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 26 treesize of output 40 [2018-12-24 14:31:16,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,466 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 28 treesize of output 54 [2018-12-24 14:31:16,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:31:16,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:16,497 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,546 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,579 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,605 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,623 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,639 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,678 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:16,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,726 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:16,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,776 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:16,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,834 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:16,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:16,906 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:16,907 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,933 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,960 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:16,987 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:17,014 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:17,062 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:17,062 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:17,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:31:17,102 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:17,147 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:17,148 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:17,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,182 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:31:17,185 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:17,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:17,237 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:31:17,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:17,281 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:17,282 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:31:17,282 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:17,333 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. [2018-12-24 14:31:17,334 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2018-12-24 14:31:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:17,725 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:17,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:17,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:17,889 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:17,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:17,890 INFO L87 Difference]: Start difference. First operand 325 states and 2130 transitions. Second operand 10 states. [2018-12-24 14:31:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:18,560 INFO L93 Difference]: Finished difference Result 368 states and 2210 transitions. [2018-12-24 14:31:18,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:18,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:18,566 INFO L225 Difference]: With dead ends: 368 [2018-12-24 14:31:18,566 INFO L226 Difference]: Without dead ends: 366 [2018-12-24 14:31:18,566 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:18,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2018-12-24 14:31:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 329. [2018-12-24 14:31:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-12-24 14:31:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 2135 transitions. [2018-12-24 14:31:18,646 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 2135 transitions. Word has length 6 [2018-12-24 14:31:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:18,646 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 2135 transitions. [2018-12-24 14:31:18,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 2135 transitions. [2018-12-24 14:31:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:18,648 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:18,648 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:31:18,648 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash 904329640, now seen corresponding path program 3 times [2018-12-24 14:31:18,649 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:18,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:18,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:18,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:18,649 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:18,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:18,710 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:18,710 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:31:18,710 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:31:18,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:18,711 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:18,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:31:18,722 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:31:18,727 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:31:18,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:31:18,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:18,752 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 21 treesize of output 24 [2018-12-24 14:31:18,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:18,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,767 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 26 treesize of output 40 [2018-12-24 14:31:18,772 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,778 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 28 treesize of output 54 [2018-12-24 14:31:18,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,788 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 30 treesize of output 72 [2018-12-24 14:31:18,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,798 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:18,798 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:18,840 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:18,862 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:18,880 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:18,895 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:18,909 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:18,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:18,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:18,984 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:19,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,032 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:19,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,086 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:19,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,160 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:19,162 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,188 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,214 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,241 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,268 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,316 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:19,316 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:19,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,346 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:31:19,347 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,391 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:19,392 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:19,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,428 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:31:19,429 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,480 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:19,480 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:31:19,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,516 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:19,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:31:19,519 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:19,571 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:31:19,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,604 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:19,616 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 135 [2018-12-24 14:31:19,617 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:19,673 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. [2018-12-24 14:31:19,674 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:45 [2018-12-24 14:31:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:19,695 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:19,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:19,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:31:19,758 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:19,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:31:19,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:31:19,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:19,759 INFO L87 Difference]: Start difference. First operand 329 states and 2135 transitions. Second operand 11 states. [2018-12-24 14:31:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:20,567 INFO L93 Difference]: Finished difference Result 407 states and 2353 transitions. [2018-12-24 14:31:20,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:31:20,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:31:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:20,573 INFO L225 Difference]: With dead ends: 407 [2018-12-24 14:31:20,574 INFO L226 Difference]: Without dead ends: 401 [2018-12-24 14:31:20,574 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:31:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2018-12-24 14:31:20,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 341. [2018-12-24 14:31:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-12-24 14:31:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 2222 transitions. [2018-12-24 14:31:20,688 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 2222 transitions. Word has length 6 [2018-12-24 14:31:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:20,688 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 2222 transitions. [2018-12-24 14:31:20,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:31:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 2222 transitions. [2018-12-24 14:31:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:20,690 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:20,690 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:20,690 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash 904329206, now seen corresponding path program 1 times [2018-12-24 14:31:20,691 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:20,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:20,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:31:20,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:20,692 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:20,994 WARN L181 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2018-12-24 14:31:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:21,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:21,181 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:21,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:21,182 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [24], [27] [2018-12-24 14:31:21,184 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:21,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:21,658 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:21,658 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:31:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:21,658 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:21,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:21,658 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:21,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:21,667 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:21,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:21,704 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 21 treesize of output 24 [2018-12-24 14:31:21,708 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 24 treesize of output 30 [2018-12-24 14:31:21,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,714 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 26 treesize of output 40 [2018-12-24 14:31:21,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,776 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 28 treesize of output 54 [2018-12-24 14:31:21,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,789 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 30 treesize of output 72 [2018-12-24 14:31:21,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,804 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:21,805 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,854 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,892 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,911 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,923 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,936 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:21,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:21,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:22,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,014 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:22,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,062 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:22,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:22,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,187 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,193 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,195 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:22,195 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,222 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,248 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,275 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,301 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,347 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:22,348 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:22,385 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,385 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:31:22,386 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,430 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:22,431 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:22,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,469 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:31:22,470 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,518 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:22,518 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:31:22,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,591 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,592 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:22,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,594 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:31:22,595 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,651 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:22,652 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:31:22,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,680 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,684 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,685 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,689 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:22,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:22,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:31:22,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:22,744 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. [2018-12-24 14:31:22,744 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:31:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:22,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:22,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:22,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:31:22,834 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:22,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:31:22,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:31:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:22,835 INFO L87 Difference]: Start difference. First operand 341 states and 2222 transitions. Second operand 12 states. [2018-12-24 14:31:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:23,989 INFO L93 Difference]: Finished difference Result 645 states and 3901 transitions. [2018-12-24 14:31:23,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-24 14:31:23,990 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:31:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:23,997 INFO L225 Difference]: With dead ends: 645 [2018-12-24 14:31:23,997 INFO L226 Difference]: Without dead ends: 643 [2018-12-24 14:31:23,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-24 14:31:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-12-24 14:31:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 463. [2018-12-24 14:31:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2018-12-24 14:31:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 3101 transitions. [2018-12-24 14:31:24,121 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 3101 transitions. Word has length 6 [2018-12-24 14:31:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:24,121 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 3101 transitions. [2018-12-24 14:31:24,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:31:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 3101 transitions. [2018-12-24 14:31:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:24,123 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:24,123 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:24,123 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:24,124 INFO L82 PathProgramCache]: Analyzing trace with hash 904333674, now seen corresponding path program 1 times [2018-12-24 14:31:24,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:24,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:24,124 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:24,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:24,125 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:24,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:24,201 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:24,201 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:24,201 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [28], [30], [31] [2018-12-24 14:31:24,202 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:24,202 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:24,453 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:24,453 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:31:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:24,453 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:24,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:24,453 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:24,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:24,462 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:24,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:24,473 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 21 treesize of output 24 [2018-12-24 14:31:24,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:31:24,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,488 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 26 treesize of output 36 [2018-12-24 14:31:24,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,505 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:31:24,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,521 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 30 treesize of output 68 [2018-12-24 14:31:24,542 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:31:24,543 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,569 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,589 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,606 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,619 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,632 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,654 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:31:24,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,672 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 36 treesize of output 49 [2018-12-24 14:31:24,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,711 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 32 treesize of output 57 [2018-12-24 14:31:24,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,759 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:31:24,760 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,775 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,790 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,807 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,839 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:24,839 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:31:24,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,882 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:31:24,882 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:24,908 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:24,908 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:31:24,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:24,998 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:25,007 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:31:25,008 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:31:25,107 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:31:25,107 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:68 [2018-12-24 14:31:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:25,154 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:25,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:25,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2018-12-24 14:31:25,191 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:25,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:31:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:31:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:25,192 INFO L87 Difference]: Start difference. First operand 463 states and 3101 transitions. Second operand 9 states. [2018-12-24 14:31:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:25,787 INFO L93 Difference]: Finished difference Result 527 states and 3325 transitions. [2018-12-24 14:31:25,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:31:25,788 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:31:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:25,794 INFO L225 Difference]: With dead ends: 527 [2018-12-24 14:31:25,794 INFO L226 Difference]: Without dead ends: 524 [2018-12-24 14:31:25,795 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:31:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2018-12-24 14:31:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 487. [2018-12-24 14:31:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2018-12-24 14:31:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 3268 transitions. [2018-12-24 14:31:25,932 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 3268 transitions. Word has length 6 [2018-12-24 14:31:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:25,932 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 3268 transitions. [2018-12-24 14:31:25,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:31:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 3268 transitions. [2018-12-24 14:31:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:25,934 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:25,934 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:25,934 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 904320156, now seen corresponding path program 1 times [2018-12-24 14:31:25,934 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:25,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:25,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:25,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:25,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:26,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:26,011 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:26,011 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:26,011 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [28], [29] [2018-12-24 14:31:26,012 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:26,012 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:26,350 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:26,350 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:26,350 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:26,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:26,351 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:26,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:26,391 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:26,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:26,422 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 21 treesize of output 24 [2018-12-24 14:31:26,429 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 24 treesize of output 30 [2018-12-24 14:31:26,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,437 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 26 treesize of output 40 [2018-12-24 14:31:26,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,449 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:26,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,462 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 30 treesize of output 72 [2018-12-24 14:31:26,471 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:31:26,471 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,500 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,523 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,542 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,557 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,587 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,621 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,621 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 48 treesize of output 54 [2018-12-24 14:31:26,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,666 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 41 treesize of output 53 [2018-12-24 14:31:26,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,717 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 32 treesize of output 61 [2018-12-24 14:31:26,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,796 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:31:26,797 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,824 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,848 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,870 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:26,911 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:26,912 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:31:26,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:26,977 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:31:26,977 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:27,005 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:27,006 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:31:27,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,032 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:31:27,036 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:27,071 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:27,071 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:40 [2018-12-24 14:31:27,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:27,109 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:27,110 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 104 [2018-12-24 14:31:27,110 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:27,148 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:27,149 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:31:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:27,174 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:27,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:27,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:27,232 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:27,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:27,233 INFO L87 Difference]: Start difference. First operand 487 states and 3268 transitions. Second operand 10 states. [2018-12-24 14:31:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:27,889 INFO L93 Difference]: Finished difference Result 534 states and 3436 transitions. [2018-12-24 14:31:27,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:27,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:27,897 INFO L225 Difference]: With dead ends: 534 [2018-12-24 14:31:27,897 INFO L226 Difference]: Without dead ends: 533 [2018-12-24 14:31:27,898 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2018-12-24 14:31:28,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2018-12-24 14:31:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-12-24 14:31:28,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 3394 transitions. [2018-12-24 14:31:28,044 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 3394 transitions. Word has length 6 [2018-12-24 14:31:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:28,044 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 3394 transitions. [2018-12-24 14:31:28,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 3394 transitions. [2018-12-24 14:31:28,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:28,045 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:28,045 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:28,045 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 904806422, now seen corresponding path program 1 times [2018-12-24 14:31:28,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:28,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:28,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:28,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:28,047 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:28,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:28,105 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:28,105 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:28,106 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [24], [28], [29] [2018-12-24 14:31:28,107 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:28,107 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:28,451 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:28,452 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:28,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:28,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:28,452 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:28,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:28,461 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:28,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:28,473 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 21 treesize of output 24 [2018-12-24 14:31:28,477 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:31:28,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,490 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 26 treesize of output 36 [2018-12-24 14:31:28,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:31:28,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:31:28,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,537 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:31:28,538 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,581 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,604 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,621 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,636 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,650 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,681 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 63 treesize of output 56 [2018-12-24 14:31:28,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,703 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 53 treesize of output 63 [2018-12-24 14:31:28,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,748 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 46 treesize of output 68 [2018-12-24 14:31:28,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,804 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 37 treesize of output 76 [2018-12-24 14:31:28,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:28,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:31:28,874 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,915 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,939 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,964 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:28,991 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:29,036 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:29,036 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:31:29,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,074 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:31:29,074 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:29,117 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:29,117 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:31:29,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,155 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2018-12-24 14:31:29,156 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:29,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:29,201 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2018-12-24 14:31:29,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,230 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,235 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,238 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,239 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:29,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:29,240 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 114 [2018-12-24 14:31:29,241 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:29,287 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. [2018-12-24 14:31:29,288 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2018-12-24 14:31:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:29,313 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:29,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:29,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:29,374 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:29,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:29,374 INFO L87 Difference]: Start difference. First operand 505 states and 3394 transitions. Second operand 10 states. [2018-12-24 14:31:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:30,033 INFO L93 Difference]: Finished difference Result 543 states and 3439 transitions. [2018-12-24 14:31:30,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:30,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:30,040 INFO L225 Difference]: With dead ends: 543 [2018-12-24 14:31:30,040 INFO L226 Difference]: Without dead ends: 542 [2018-12-24 14:31:30,041 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2018-12-24 14:31:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 500. [2018-12-24 14:31:30,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-12-24 14:31:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3359 transitions. [2018-12-24 14:31:30,183 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3359 transitions. Word has length 6 [2018-12-24 14:31:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:30,183 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3359 transitions. [2018-12-24 14:31:30,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3359 transitions. [2018-12-24 14:31:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:30,185 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:30,185 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:30,185 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 904796812, now seen corresponding path program 1 times [2018-12-24 14:31:30,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:30,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:30,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:30,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:30,186 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:30,331 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:31:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:30,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:30,363 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:30,363 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:30,363 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [28], [29] [2018-12-24 14:31:30,364 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:30,364 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:30,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:30,729 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:30,729 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:30,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:30,730 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:30,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:30,738 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:30,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:30,750 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 21 treesize of output 24 [2018-12-24 14:31:30,757 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 24 treesize of output 26 [2018-12-24 14:31:30,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,768 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 26 treesize of output 36 [2018-12-24 14:31:30,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,782 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 28 treesize of output 50 [2018-12-24 14:31:30,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,796 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 30 treesize of output 68 [2018-12-24 14:31:30,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:30,814 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:31:30,815 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:30,896 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:30,916 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:30,933 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:30,947 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:30,961 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:30,989 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 63 treesize of output 56 [2018-12-24 14:31:31,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,009 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 53 treesize of output 63 [2018-12-24 14:31:31,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,054 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 46 treesize of output 68 [2018-12-24 14:31:31,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,111 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 37 treesize of output 76 [2018-12-24 14:31:31,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,181 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:31:31,181 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,207 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,232 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,258 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,286 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:31,331 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:31:31,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:31:31,368 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,411 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:31,412 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:31:31,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,445 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,447 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 101 [2018-12-24 14:31:31,451 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,496 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:31,497 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2018-12-24 14:31:31,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,529 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:31,538 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:31,539 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:31:31,539 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:31,587 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:31,587 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2018-12-24 14:31:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:31,611 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:31,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:31,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:31,669 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:31,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:31,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:31,670 INFO L87 Difference]: Start difference. First operand 500 states and 3359 transitions. Second operand 10 states. [2018-12-24 14:31:32,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:32,451 INFO L93 Difference]: Finished difference Result 537 states and 3427 transitions. [2018-12-24 14:31:32,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:32,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:32,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:32,457 INFO L225 Difference]: With dead ends: 537 [2018-12-24 14:31:32,457 INFO L226 Difference]: Without dead ends: 536 [2018-12-24 14:31:32,458 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2018-12-24 14:31:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 501. [2018-12-24 14:31:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2018-12-24 14:31:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 3366 transitions. [2018-12-24 14:31:32,582 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 3366 transitions. Word has length 6 [2018-12-24 14:31:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:32,582 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 3366 transitions. [2018-12-24 14:31:32,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 3366 transitions. [2018-12-24 14:31:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:32,583 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:32,583 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:32,583 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash 904848706, now seen corresponding path program 1 times [2018-12-24 14:31:32,583 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:32,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:32,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:32,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:32,584 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:32,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:32,682 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:32,683 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:32,683 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [29] [2018-12-24 14:31:32,684 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:32,684 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:33,004 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:33,004 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:33,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:33,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:33,005 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:33,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:33,015 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:33,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:33,051 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 21 treesize of output 24 [2018-12-24 14:31:33,054 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 24 treesize of output 30 [2018-12-24 14:31:33,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,061 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 26 treesize of output 40 [2018-12-24 14:31:33,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,073 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:33,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,084 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 30 treesize of output 72 [2018-12-24 14:31:33,091 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,093 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,095 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,100 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:33,101 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,141 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,166 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,183 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,198 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,212 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,248 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:33,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:33,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,334 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,337 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:33,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:33,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:33,471 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,496 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,520 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,547 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,574 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,622 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:33,622 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:33,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,659 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:31:33,659 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,701 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:33,701 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:33,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,732 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,735 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:33,735 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 106 [2018-12-24 14:31:33,736 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,784 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:33,785 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:59 [2018-12-24 14:31:33,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,817 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:33,821 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:31:33,822 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:33,873 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. [2018-12-24 14:31:33,873 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:73, output treesize:51 [2018-12-24 14:31:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:33,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:33,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:33,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:33,960 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:33,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:33,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:33,961 INFO L87 Difference]: Start difference. First operand 501 states and 3366 transitions. Second operand 10 states. [2018-12-24 14:31:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:34,706 INFO L93 Difference]: Finished difference Result 588 states and 3737 transitions. [2018-12-24 14:31:34,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:34,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:34,711 INFO L225 Difference]: With dead ends: 588 [2018-12-24 14:31:34,711 INFO L226 Difference]: Without dead ends: 587 [2018-12-24 14:31:34,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2018-12-24 14:31:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 534. [2018-12-24 14:31:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2018-12-24 14:31:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 3605 transitions. [2018-12-24 14:31:34,863 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 3605 transitions. Word has length 6 [2018-12-24 14:31:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:34,863 INFO L480 AbstractCegarLoop]: Abstraction has 534 states and 3605 transitions. [2018-12-24 14:31:34,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 3605 transitions. [2018-12-24 14:31:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:34,865 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:34,865 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:34,865 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash 904869912, now seen corresponding path program 1 times [2018-12-24 14:31:34,865 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:34,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:34,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:34,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:34,866 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:34,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:34,918 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:34,918 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:34,919 INFO L207 CegarAbsIntRunner]: [0], [18], [24], [28], [30], [31] [2018-12-24 14:31:34,919 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:34,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:35,286 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:35,287 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:31:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:35,287 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:35,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:35,287 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:35,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:35,303 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:35,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:35,346 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 21 treesize of output 24 [2018-12-24 14:31:35,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:31:35,451 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,474 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:31:35,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,579 INFO L303 Elim1Store]: Index analysis took 104 ms [2018-12-24 14:31:35,580 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 28 treesize of output 50 [2018-12-24 14:31:35,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,704 INFO L303 Elim1Store]: Index analysis took 122 ms [2018-12-24 14:31:35,705 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 30 treesize of output 68 [2018-12-24 14:31:35,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:35,875 INFO L303 Elim1Store]: Index analysis took 169 ms [2018-12-24 14:31:35,876 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:31:35,877 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,343 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,469 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,486 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,500 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,514 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,542 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 63 treesize of output 56 [2018-12-24 14:31:36,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,562 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 53 treesize of output 63 [2018-12-24 14:31:36,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,603 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,607 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 46 treesize of output 68 [2018-12-24 14:31:36,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,663 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:31:36,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,732 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:31:36,732 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,756 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,781 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,808 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,839 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,884 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:36,885 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:31:36,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,915 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:31:36,916 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:36,959 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:36,959 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:31:36,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:36,991 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:36,992 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2018-12-24 14:31:36,993 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:37,043 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:37,043 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:55 [2018-12-24 14:31:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:37,064 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:37,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:37,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:31:37,118 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:37,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:31:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:31:37,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:37,119 INFO L87 Difference]: Start difference. First operand 534 states and 3605 transitions. Second operand 8 states. [2018-12-24 14:31:37,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:37,658 INFO L93 Difference]: Finished difference Result 558 states and 3635 transitions. [2018-12-24 14:31:37,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:31:37,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:31:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:37,662 INFO L225 Difference]: With dead ends: 558 [2018-12-24 14:31:37,662 INFO L226 Difference]: Without dead ends: 557 [2018-12-24 14:31:37,663 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2018-12-24 14:31:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 533. [2018-12-24 14:31:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2018-12-24 14:31:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 3598 transitions. [2018-12-24 14:31:37,814 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 3598 transitions. Word has length 6 [2018-12-24 14:31:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:37,814 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 3598 transitions. [2018-12-24 14:31:37,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:31:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 3598 transitions. [2018-12-24 14:31:37,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:37,816 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:37,816 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:37,816 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:37,817 INFO L82 PathProgramCache]: Analyzing trace with hash 904431632, now seen corresponding path program 1 times [2018-12-24 14:31:37,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:37,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:37,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:37,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:37,818 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:37,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:37,911 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:37,912 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:37,912 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [29] [2018-12-24 14:31:37,915 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:37,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:38,244 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:38,244 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:38,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:38,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:38,245 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:38,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:38,254 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:38,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:38,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,303 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 48 treesize of output 54 [2018-12-24 14:31:38,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,342 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 41 treesize of output 53 [2018-12-24 14:31:38,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,380 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 32 treesize of output 61 [2018-12-24 14:31:38,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:31:38,431 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,449 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,466 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,484 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,509 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:38,514 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:38,517 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:31:38,521 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:38,525 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 30 treesize of output 72 [2018-12-24 14:31:38,532 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:31:38,533 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,559 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,580 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,597 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,611 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,623 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,657 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:38,657 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:31:38,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,696 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:31:38,696 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,724 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:38,725 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:31:38,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,750 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:38,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:31:38,751 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,783 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:38,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:42 [2018-12-24 14:31:38,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,812 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:38,814 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 90 [2018-12-24 14:31:38,814 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:38,848 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:38,849 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-12-24 14:31:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:38,867 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:38,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:38,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:31:38,911 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:38,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:38,911 INFO L87 Difference]: Start difference. First operand 533 states and 3598 transitions. Second operand 10 states. [2018-12-24 14:31:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:39,654 INFO L93 Difference]: Finished difference Result 795 states and 5176 transitions. [2018-12-24 14:31:39,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:31:39,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:39,659 INFO L225 Difference]: With dead ends: 795 [2018-12-24 14:31:39,659 INFO L226 Difference]: Without dead ends: 794 [2018-12-24 14:31:39,660 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2018-12-24 14:31:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 484. [2018-12-24 14:31:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-12-24 14:31:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 3230 transitions. [2018-12-24 14:31:39,834 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 3230 transitions. Word has length 6 [2018-12-24 14:31:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:39,835 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 3230 transitions. [2018-12-24 14:31:39,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 3230 transitions. [2018-12-24 14:31:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:39,836 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:39,836 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:39,837 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash 904452838, now seen corresponding path program 1 times [2018-12-24 14:31:39,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:39,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:39,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:39,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:39,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:39,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:39,975 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:39,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:39,975 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [28], [30], [31] [2018-12-24 14:31:39,976 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:39,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:40,225 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:40,225 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:31:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:40,226 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:40,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:40,226 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:40,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:40,235 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:40,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:40,246 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 21 treesize of output 24 [2018-12-24 14:31:40,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:31:40,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,265 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:31:40,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,278 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 28 treesize of output 50 [2018-12-24 14:31:40,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,297 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 30 treesize of output 68 [2018-12-24 14:31:40,311 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:31:40,312 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,341 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,360 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,377 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,421 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,441 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:31:40,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,481 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 36 treesize of output 49 [2018-12-24 14:31:40,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,518 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 57 [2018-12-24 14:31:40,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,568 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:31:40,568 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,584 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,599 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,615 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,646 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:40,646 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:31:40,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:31:40,692 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:40,719 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:40,719 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:31:40,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:40,749 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:40,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 81 [2018-12-24 14:31:40,759 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:31:40,851 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:31:40,852 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:76 [2018-12-24 14:31:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:40,910 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:40,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:40,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2018-12-24 14:31:40,954 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:40,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:31:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:31:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:31:40,955 INFO L87 Difference]: Start difference. First operand 484 states and 3230 transitions. Second operand 9 states. [2018-12-24 14:31:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:41,696 INFO L93 Difference]: Finished difference Result 539 states and 3425 transitions. [2018-12-24 14:31:41,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:31:41,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:31:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:41,699 INFO L225 Difference]: With dead ends: 539 [2018-12-24 14:31:41,699 INFO L226 Difference]: Without dead ends: 538 [2018-12-24 14:31:41,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:31:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2018-12-24 14:31:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 500. [2018-12-24 14:31:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2018-12-24 14:31:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 3342 transitions. [2018-12-24 14:31:41,926 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 3342 transitions. Word has length 6 [2018-12-24 14:31:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:41,926 INFO L480 AbstractCegarLoop]: Abstraction has 500 states and 3342 transitions. [2018-12-24 14:31:41,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:31:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 3342 transitions. [2018-12-24 14:31:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:41,927 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:41,927 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:31:41,927 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 893599114, now seen corresponding path program 4 times [2018-12-24 14:31:41,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:41,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:41,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:41,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:41,929 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:42,157 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2018-12-24 14:31:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:42,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:42,205 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:42,205 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:31:42,206 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:31:42,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:42,206 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:42,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:42,215 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:42,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:42,242 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 21 treesize of output 24 [2018-12-24 14:31:42,246 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 24 treesize of output 30 [2018-12-24 14:31:42,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:31:42,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:42,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,278 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 30 treesize of output 72 [2018-12-24 14:31:42,288 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:31:42,289 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,319 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,342 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,360 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,373 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,387 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,416 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 48 treesize of output 54 [2018-12-24 14:31:42,448 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,449 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,450 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:31:42,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,487 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:31:42,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,578 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:31:42,578 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,594 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,609 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,626 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:42,660 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:42,660 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:31:42,922 WARN L181 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-12-24 14:31:42,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:42,971 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:31:42,972 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:31:43,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2018-12-24 14:31:43,084 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:109 [2018-12-24 14:31:43,334 WARN L181 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-12-24 14:31:43,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,346 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 81 [2018-12-24 14:31:43,347 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:43,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,435 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 91 [2018-12-24 14:31:43,446 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-12-24 14:31:43,574 INFO L267 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:31:43,574 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:126 [2018-12-24 14:31:43,828 WARN L181 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-12-24 14:31:43,845 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,847 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,857 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 101 [2018-12-24 14:31:43,858 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:43,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:43,969 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 111 [2018-12-24 14:31:43,970 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:44,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,069 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,078 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:31:44,079 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:44,165 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 11 dim-0 vars, and 3 xjuncts. [2018-12-24 14:31:44,166 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:159, output treesize:123 [2018-12-24 14:31:44,486 WARN L181 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-12-24 14:31:44,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,510 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,511 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,513 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,537 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 125 [2018-12-24 14:31:44,540 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:31:44,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,934 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:44,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:31:44,940 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:45,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,097 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,106 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:45,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:45,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2018-12-24 14:31:45,109 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:45,253 INFO L267 ElimStorePlain]: Start of recursive call 1: 13 dim-0 vars, 3 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:31:45,254 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 16 variables, input treesize:156, output treesize:238 [2018-12-24 14:31:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:45,394 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:45,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:45,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:31:45,491 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:45,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:31:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:31:45,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:45,492 INFO L87 Difference]: Start difference. First operand 500 states and 3342 transitions. Second operand 11 states. [2018-12-24 14:31:45,806 WARN L181 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2018-12-24 14:31:46,557 WARN L181 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2018-12-24 14:31:47,126 WARN L181 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2018-12-24 14:31:47,785 WARN L181 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2018-12-24 14:31:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:48,695 INFO L93 Difference]: Finished difference Result 678 states and 4253 transitions. [2018-12-24 14:31:48,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:31:48,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:31:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:48,700 INFO L225 Difference]: With dead ends: 678 [2018-12-24 14:31:48,700 INFO L226 Difference]: Without dead ends: 673 [2018-12-24 14:31:48,701 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:31:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2018-12-24 14:31:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 555. [2018-12-24 14:31:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2018-12-24 14:31:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 3727 transitions. [2018-12-24 14:31:48,954 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 3727 transitions. Word has length 6 [2018-12-24 14:31:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:48,954 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 3727 transitions. [2018-12-24 14:31:48,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:31:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 3727 transitions. [2018-12-24 14:31:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:48,955 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:48,955 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-12-24 14:31:48,956 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash 893598680, now seen corresponding path program 2 times [2018-12-24 14:31:48,956 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:48,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:48,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:48,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:48,957 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:49,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:49,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:49,124 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:31:49,124 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:31:49,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:49,124 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:49,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:31:49,133 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:31:49,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:31:49,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:31:49,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:49,168 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 21 treesize of output 24 [2018-12-24 14:31:49,171 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:49,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,180 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 26 treesize of output 40 [2018-12-24 14:31:49,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,184 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,186 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 28 treesize of output 54 [2018-12-24 14:31:49,190 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,195 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 30 treesize of output 72 [2018-12-24 14:31:49,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:49,205 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,246 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,271 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,289 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,302 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,317 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,353 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:49,392 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:49,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,441 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,443 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:49,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,502 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:49,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,574 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,577 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:49,578 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,606 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,633 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,660 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,688 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,736 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:49,736 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:49,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:31:49,771 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:49,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:49,817 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:49,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:49,961 INFO L303 Elim1Store]: Index analysis took 122 ms [2018-12-24 14:31:49,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:31:49,962 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:50,009 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:50,010 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:31:50,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,047 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:31:50,048 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:50,105 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:50,105 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:55 [2018-12-24 14:31:50,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:50,148 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 135 [2018-12-24 14:31:50,149 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:50,216 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. [2018-12-24 14:31:50,217 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:45 [2018-12-24 14:31:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:50,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:50,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:50,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:31:50,311 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:50,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:31:50,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:31:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:50,311 INFO L87 Difference]: Start difference. First operand 555 states and 3727 transitions. Second operand 11 states. [2018-12-24 14:31:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:51,251 INFO L93 Difference]: Finished difference Result 704 states and 4501 transitions. [2018-12-24 14:31:51,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:31:51,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-12-24 14:31:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:51,257 INFO L225 Difference]: With dead ends: 704 [2018-12-24 14:31:51,258 INFO L226 Difference]: Without dead ends: 703 [2018-12-24 14:31:51,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:31:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2018-12-24 14:31:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 655. [2018-12-24 14:31:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2018-12-24 14:31:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 4427 transitions. [2018-12-24 14:31:51,504 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 4427 transitions. Word has length 6 [2018-12-24 14:31:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:51,504 INFO L480 AbstractCegarLoop]: Abstraction has 655 states and 4427 transitions. [2018-12-24 14:31:51,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:31:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 4427 transitions. [2018-12-24 14:31:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:51,506 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:51,506 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:51,506 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash 893604446, now seen corresponding path program 2 times [2018-12-24 14:31:51,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:51,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:51,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:31:51,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:51,507 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:51,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:51,673 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:51,673 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:31:51,673 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:31:51,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:51,673 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:51,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:31:51,683 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:31:51,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:31:51,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:31:51,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:51,713 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 21 treesize of output 24 [2018-12-24 14:31:51,716 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 24 treesize of output 30 [2018-12-24 14:31:51,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,722 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 26 treesize of output 40 [2018-12-24 14:31:51,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,729 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 28 treesize of output 54 [2018-12-24 14:31:51,733 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,740 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 30 treesize of output 72 [2018-12-24 14:31:51,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,750 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:51,750 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:51,791 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:51,814 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:51,833 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:51,849 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:51,864 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:51,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:51,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,941 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:51,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:51,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:52,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,048 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:52,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,120 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:52,121 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,148 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,183 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,220 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,249 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,298 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:52,298 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:52,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,340 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:31:52,341 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,390 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:52,390 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:52,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,435 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:31:52,435 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,485 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:52,485 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:31:52,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,526 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:52,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,528 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:31:52,529 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,581 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:52,582 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:31:52,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,615 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,616 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,617 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,618 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:52,619 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:52,619 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:31:52,620 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:52,673 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. [2018-12-24 14:31:52,673 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:31:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:52,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:52,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:52,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:31:52,773 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:52,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:31:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:31:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:52,774 INFO L87 Difference]: Start difference. First operand 655 states and 4427 transitions. Second operand 12 states. [2018-12-24 14:31:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:54,216 INFO L93 Difference]: Finished difference Result 1218 states and 7896 transitions. [2018-12-24 14:31:54,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:31:54,217 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:31:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:54,225 INFO L225 Difference]: With dead ends: 1218 [2018-12-24 14:31:54,225 INFO L226 Difference]: Without dead ends: 1217 [2018-12-24 14:31:54,226 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:31:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2018-12-24 14:31:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 738. [2018-12-24 14:31:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2018-12-24 14:31:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 5008 transitions. [2018-12-24 14:31:54,672 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 5008 transitions. Word has length 6 [2018-12-24 14:31:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:54,673 INFO L480 AbstractCegarLoop]: Abstraction has 738 states and 5008 transitions. [2018-12-24 14:31:54,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:31:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 5008 transitions. [2018-12-24 14:31:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:54,674 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:54,674 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:54,674 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash 893724170, now seen corresponding path program 1 times [2018-12-24 14:31:54,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:54,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:54,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:31:54,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:54,675 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:54,825 WARN L181 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:31:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:54,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:54,874 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:54,874 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:54,875 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [29] [2018-12-24 14:31:54,875 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:54,876 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:55,212 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:55,213 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:55,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:55,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:55,213 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:55,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:55,223 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:55,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:55,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:55,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:55,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,298 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 26 treesize of output 40 [2018-12-24 14:31:55,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,307 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 28 treesize of output 54 [2018-12-24 14:31:55,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,321 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 30 treesize of output 72 [2018-12-24 14:31:55,330 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,332 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,338 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:31:55,339 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,379 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,402 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,421 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,437 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,451 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:31:55,523 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:31:55,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,571 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:31:55,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,631 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:31:55,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:31:55,707 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,733 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,759 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,786 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,813 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,861 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:55,861 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:31:55,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:31:55,897 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:55,942 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:55,942 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:31:55,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:55,979 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:55,980 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:31:55,980 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:56,028 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:56,028 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:81, output treesize:59 [2018-12-24 14:31:56,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:56,068 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:31:56,069 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:56,119 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. [2018-12-24 14:31:56,119 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:47 [2018-12-24 14:31:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:56,147 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:56,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:56,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:31:56,207 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:56,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:31:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:31:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:31:56,207 INFO L87 Difference]: Start difference. First operand 738 states and 5008 transitions. Second operand 10 states. [2018-12-24 14:31:57,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:57,112 INFO L93 Difference]: Finished difference Result 814 states and 5311 transitions. [2018-12-24 14:31:57,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:57,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:31:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:57,117 INFO L225 Difference]: With dead ends: 814 [2018-12-24 14:31:57,117 INFO L226 Difference]: Without dead ends: 811 [2018-12-24 14:31:57,118 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:31:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2018-12-24 14:31:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 775. [2018-12-24 14:31:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2018-12-24 14:31:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 5267 transitions. [2018-12-24 14:31:57,545 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 5267 transitions. Word has length 6 [2018-12-24 14:31:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:31:57,545 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 5267 transitions. [2018-12-24 14:31:57,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:31:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 5267 transitions. [2018-12-24 14:31:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:31:57,547 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:31:57,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:31:57,547 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:31:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash 893714560, now seen corresponding path program 1 times [2018-12-24 14:31:57,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:31:57,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:57,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:57,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:31:57,549 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:31:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:57,832 WARN L181 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2018-12-24 14:31:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:31:57,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:57,850 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:31:57,851 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:31:57,851 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [28], [29] [2018-12-24 14:31:57,852 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:31:57,852 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:31:58,186 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:31:58,186 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:31:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:31:58,186 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:31:58,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:31:58,186 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:31:58,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:31:58,194 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:31:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:31:58,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:31:58,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,229 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 48 treesize of output 54 [2018-12-24 14:31:58,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,274 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 41 treesize of output 53 [2018-12-24 14:31:58,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,320 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 32 treesize of output 61 [2018-12-24 14:31:58,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:31:58,370 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,388 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,406 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,424 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,448 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:31:58,451 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:31:58,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:31:58,458 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:31:58,462 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 30 treesize of output 72 [2018-12-24 14:31:58,471 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:31:58,472 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,498 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,520 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,537 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,550 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,560 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:58,595 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:31:58,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,653 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:31:58,653 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,685 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:58,686 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:31:58,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,717 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:58,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:31:58,719 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,748 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:58,749 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2018-12-24 14:31:58,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,777 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:31:58,783 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:31:58,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:31:58,785 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:31:58,817 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:31:58,818 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:42 [2018-12-24 14:31:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:58,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:31:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:31:58,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:31:58,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2018-12-24 14:31:58,904 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:31:58,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-24 14:31:58,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-24 14:31:58,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:31:58,905 INFO L87 Difference]: Start difference. First operand 775 states and 5267 transitions. Second operand 9 states. [2018-12-24 14:31:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:31:59,836 INFO L93 Difference]: Finished difference Result 812 states and 5339 transitions. [2018-12-24 14:31:59,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:31:59,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 6 [2018-12-24 14:31:59,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:31:59,841 INFO L225 Difference]: With dead ends: 812 [2018-12-24 14:31:59,841 INFO L226 Difference]: Without dead ends: 811 [2018-12-24 14:31:59,842 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:31:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2018-12-24 14:32:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 780. [2018-12-24 14:32:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-12-24 14:32:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 5302 transitions. [2018-12-24 14:32:00,232 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 5302 transitions. Word has length 6 [2018-12-24 14:32:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:00,232 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 5302 transitions. [2018-12-24 14:32:00,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-24 14:32:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 5302 transitions. [2018-12-24 14:32:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:00,234 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:00,234 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:00,234 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash 893787660, now seen corresponding path program 1 times [2018-12-24 14:32:00,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:00,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:00,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:00,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:00,235 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:32:00,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:00,328 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:00,329 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:00,329 INFO L207 CegarAbsIntRunner]: [0], [6], [24], [28], [30], [31] [2018-12-24 14:32:00,330 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:00,330 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:00,610 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:00,610 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:00,611 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:00,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:00,611 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:00,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:00,621 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:00,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:00,629 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 21 treesize of output 24 [2018-12-24 14:32:00,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:32:00,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,642 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 26 treesize of output 36 [2018-12-24 14:32:00,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,656 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:32:00,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,675 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 30 treesize of output 68 [2018-12-24 14:32:00,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,689 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,692 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:32:00,693 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:00,737 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:00,757 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:00,772 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:00,785 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:00,800 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:00,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:32:00,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,847 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 53 treesize of output 63 [2018-12-24 14:32:00,885 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,889 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:32:00,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:00,946 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:32:01,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,017 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:32:01,018 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:01,043 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:01,067 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:01,093 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:01,120 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:01,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:01,165 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:32:01,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,392 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:32:01,393 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:01,751 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:32:01,751 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2018-12-24 14:32:01,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:01,805 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:32:01,806 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:01,838 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:01,839 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:38 [2018-12-24 14:32:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:01,861 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:01,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:01,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:32:01,898 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:01,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:32:01,899 INFO L87 Difference]: Start difference. First operand 780 states and 5302 transitions. Second operand 8 states. [2018-12-24 14:32:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:02,630 INFO L93 Difference]: Finished difference Result 843 states and 5575 transitions. [2018-12-24 14:32:02,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:32:02,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:32:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:02,634 INFO L225 Difference]: With dead ends: 843 [2018-12-24 14:32:02,634 INFO L226 Difference]: Without dead ends: 842 [2018-12-24 14:32:02,634 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-12-24 14:32:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2018-12-24 14:32:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2018-12-24 14:32:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2018-12-24 14:32:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 5533 transitions. [2018-12-24 14:32:03,017 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 5533 transitions. Word has length 6 [2018-12-24 14:32:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:03,017 INFO L480 AbstractCegarLoop]: Abstraction has 813 states and 5533 transitions. [2018-12-24 14:32:03,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 5533 transitions. [2018-12-24 14:32:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:03,018 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:03,019 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:03,019 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash 893774142, now seen corresponding path program 1 times [2018-12-24 14:32:03,019 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:03,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:03,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:03,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:03,020 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:32:03,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:03,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:03,089 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:03,089 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [29] [2018-12-24 14:32:03,090 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:03,090 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:03,449 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:03,449 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:32:03,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:03,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:03,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:03,450 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:03,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:03,461 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:03,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:03,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,504 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 48 treesize of output 54 [2018-12-24 14:32:03,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,549 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 41 treesize of output 53 [2018-12-24 14:32:03,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,602 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:32:03,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:03,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:32:03,654 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,675 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,698 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,722 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,784 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:32:03,786 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:32:03,788 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:32:03,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:03,798 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:32:03,810 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:32:03,811 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,837 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,858 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,873 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,887 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,898 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:03,931 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:03,932 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:32:04,036 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,046 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:32:04,047 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:04,158 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:32:04,159 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2018-12-24 14:32:04,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 103 [2018-12-24 14:32:04,324 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 16 xjuncts. [2018-12-24 14:32:04,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:04,650 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:04,651 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 88 [2018-12-24 14:32:04,652 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:04,816 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: 19 dim-0 vars, and 6 xjuncts. [2018-12-24 14:32:04,816 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:126, output treesize:278 [2018-12-24 14:32:05,775 WARN L181 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 103 [2018-12-24 14:32:05,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,783 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 88 [2018-12-24 14:32:05,783 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:05,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,917 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:05,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:05,919 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 100 [2018-12-24 14:32:05,920 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,038 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,048 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:06,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,050 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 94 [2018-12-24 14:32:06,051 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:06,182 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:06,183 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:32:06,183 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:06,286 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2018-12-24 14:32:06,287 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:227, output treesize:173 [2018-12-24 14:32:06,440 WARN L181 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2018-12-24 14:32:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:06,445 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:06,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:06,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:32:06,542 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:06,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:06,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:06,543 INFO L87 Difference]: Start difference. First operand 813 states and 5533 transitions. Second operand 10 states. [2018-12-24 14:32:06,753 WARN L181 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2018-12-24 14:32:07,003 WARN L181 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2018-12-24 14:32:07,395 WARN L181 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2018-12-24 14:32:08,083 WARN L181 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 83 [2018-12-24 14:32:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:08,425 INFO L93 Difference]: Finished difference Result 896 states and 5824 transitions. [2018-12-24 14:32:08,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:32:08,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:32:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:08,430 INFO L225 Difference]: With dead ends: 896 [2018-12-24 14:32:08,430 INFO L226 Difference]: Without dead ends: 895 [2018-12-24 14:32:08,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:32:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-12-24 14:32:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 848. [2018-12-24 14:32:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2018-12-24 14:32:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 5778 transitions. [2018-12-24 14:32:08,834 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 5778 transitions. Word has length 6 [2018-12-24 14:32:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:08,835 INFO L480 AbstractCegarLoop]: Abstraction has 848 states and 5778 transitions. [2018-12-24 14:32:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:32:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 5778 transitions. [2018-12-24 14:32:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:08,836 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:08,837 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:08,837 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:08,837 INFO L82 PathProgramCache]: Analyzing trace with hash 893364756, now seen corresponding path program 1 times [2018-12-24 14:32:08,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:08,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:08,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:08,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:08,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:08,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:08,921 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:08,921 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:08,921 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [22], [28], [29] [2018-12-24 14:32:08,924 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:08,924 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:09,229 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:09,229 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:32:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:09,229 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:09,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:09,230 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:09,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:09,238 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:09,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:09,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,276 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 48 treesize of output 54 [2018-12-24 14:32:09,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,320 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 41 treesize of output 53 [2018-12-24 14:32:09,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,360 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 32 treesize of output 61 [2018-12-24 14:32:09,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,411 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:32:09,411 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,429 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,447 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,464 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,490 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:32:09,492 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:32:09,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:32:09,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:09,502 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 30 treesize of output 72 [2018-12-24 14:32:09,510 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:32:09,511 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,538 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,557 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,575 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,589 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,600 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:09,635 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:72, output treesize:71 [2018-12-24 14:32:09,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,677 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:32:09,678 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:09,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:50 [2018-12-24 14:32:09,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,743 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:32:09,743 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:09,777 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:09,778 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:38 [2018-12-24 14:32:09,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,806 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,809 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:09,809 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:09,811 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:32:09,812 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:10,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:10,007 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:36 [2018-12-24 14:32:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:10,026 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:10,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:10,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:32:10,083 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:10,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:10,084 INFO L87 Difference]: Start difference. First operand 848 states and 5778 transitions. Second operand 10 states. [2018-12-24 14:32:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:11,167 INFO L93 Difference]: Finished difference Result 975 states and 6393 transitions. [2018-12-24 14:32:11,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:11,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:32:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:11,172 INFO L225 Difference]: With dead ends: 975 [2018-12-24 14:32:11,172 INFO L226 Difference]: Without dead ends: 973 [2018-12-24 14:32:11,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:32:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2018-12-24 14:32:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 930. [2018-12-24 14:32:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2018-12-24 14:32:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 6346 transitions. [2018-12-24 14:32:11,600 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 6346 transitions. Word has length 6 [2018-12-24 14:32:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:11,601 INFO L480 AbstractCegarLoop]: Abstraction has 930 states and 6346 transitions. [2018-12-24 14:32:11,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:32:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 6346 transitions. [2018-12-24 14:32:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:11,603 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:11,604 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:11,604 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash 893370586, now seen corresponding path program 1 times [2018-12-24 14:32:11,604 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:11,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:11,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:11,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:11,605 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:11,740 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-12-24 14:32:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:32:11,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:11,765 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:11,766 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:11,766 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [28], [30], [31] [2018-12-24 14:32:11,767 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:11,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:12,030 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:12,030 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:32:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:12,030 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:12,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:12,031 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:12,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:12,040 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:12,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:12,052 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 21 treesize of output 24 [2018-12-24 14:32:12,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:32:12,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,067 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:32:12,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,085 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 28 treesize of output 50 [2018-12-24 14:32:12,090 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,094 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,099 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:32:12,119 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:32:12,120 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,147 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,169 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,186 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,200 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,214 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,239 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 43 treesize of output 39 [2018-12-24 14:32:12,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,261 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 36 treesize of output 49 [2018-12-24 14:32:12,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,296 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 32 treesize of output 57 [2018-12-24 14:32:12,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,338 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,339 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,340 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,344 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:32:12,345 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,361 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,376 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,392 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,424 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:12,424 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:32:12,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,471 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:32:12,472 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:12,567 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:32:12,568 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2018-12-24 14:32:12,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,613 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 86 [2018-12-24 14:32:12,614 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,693 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,695 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,697 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:12,699 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:12,699 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 59 [2018-12-24 14:32:12,699 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:12,752 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 2 xjuncts. [2018-12-24 14:32:12,753 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:108, output treesize:84 [2018-12-24 14:32:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:12,853 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:12,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:12,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:32:12,901 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:12,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:32:12,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:32:12,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:32:12,901 INFO L87 Difference]: Start difference. First operand 930 states and 6346 transitions. Second operand 8 states. [2018-12-24 14:32:15,319 WARN L181 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2018-12-24 14:32:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:16,412 INFO L93 Difference]: Finished difference Result 985 states and 6551 transitions. [2018-12-24 14:32:16,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:32:16,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:32:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:16,417 INFO L225 Difference]: With dead ends: 985 [2018-12-24 14:32:16,417 INFO L226 Difference]: Without dead ends: 984 [2018-12-24 14:32:16,418 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:16,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2018-12-24 14:32:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 951. [2018-12-24 14:32:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2018-12-24 14:32:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 6492 transitions. [2018-12-24 14:32:16,880 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 6492 transitions. Word has length 6 [2018-12-24 14:32:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:16,881 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 6492 transitions. [2018-12-24 14:32:16,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:32:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 6492 transitions. [2018-12-24 14:32:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:16,883 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:16,883 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:16,883 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:16,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:16,883 INFO L82 PathProgramCache]: Analyzing trace with hash 908380782, now seen corresponding path program 1 times [2018-12-24 14:32:16,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:16,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:16,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:16,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:16,884 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:16,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:16,986 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:16,986 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:16,986 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [22], [24], [27] [2018-12-24 14:32:16,987 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:16,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:17,432 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:17,432 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:32:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:17,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:17,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:17,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:17,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:17,441 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:17,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:17,485 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:32:17,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:32:17,575 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,580 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:32:17,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:32:17,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,716 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:17,718 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:32:17,719 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,747 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,781 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,809 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,841 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,888 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 21 treesize of output 24 [2018-12-24 14:32:17,892 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:32:17,895 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:32:17,898 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:17,901 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:32:17,905 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:32:17,906 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,956 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:17,984 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,003 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,015 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,026 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,075 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:18,075 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:32:18,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:32:18,125 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,172 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:18,172 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:32:18,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,216 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:32:18,217 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,276 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:18,277 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:32:18,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,319 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:18,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:32:18,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,373 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:18,373 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:32:18,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,416 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:18,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:18,418 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:32:18,419 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:18,470 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. [2018-12-24 14:32:18,470 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:32:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:18,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:19,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:19,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:32:19,455 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:19,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:32:19,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:32:19,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:32:19,456 INFO L87 Difference]: Start difference. First operand 951 states and 6492 transitions. Second operand 12 states. [2018-12-24 14:32:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:24,103 INFO L93 Difference]: Finished difference Result 1024 states and 6701 transitions. [2018-12-24 14:32:24,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:24,103 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:32:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:24,108 INFO L225 Difference]: With dead ends: 1024 [2018-12-24 14:32:24,108 INFO L226 Difference]: Without dead ends: 1023 [2018-12-24 14:32:24,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:32:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2018-12-24 14:32:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2018-12-24 14:32:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2018-12-24 14:32:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 6467 transitions. [2018-12-24 14:32:24,570 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 6467 transitions. Word has length 6 [2018-12-24 14:32:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:24,570 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 6467 transitions. [2018-12-24 14:32:24,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:32:24,571 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 6467 transitions. [2018-12-24 14:32:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:24,572 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:24,572 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:24,573 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash 908380906, now seen corresponding path program 1 times [2018-12-24 14:32:24,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:24,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:24,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:24,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:24,574 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:24,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:24,748 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:24,748 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:24,748 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [27] [2018-12-24 14:32:24,749 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:24,749 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:25,210 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:25,210 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:32:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:25,210 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:25,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:25,210 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:25,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:25,218 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:25,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:25,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:32:25,253 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 24 treesize of output 30 [2018-12-24 14:32:25,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,262 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 26 treesize of output 40 [2018-12-24 14:32:25,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:25,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,285 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 30 treesize of output 72 [2018-12-24 14:32:25,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,300 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:32:25,301 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,341 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,363 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,383 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,397 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,411 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,445 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:32:25,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,484 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:32:25,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,533 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:32:25,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,590 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:32:25,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:32:25,667 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,694 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,721 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,748 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,775 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,822 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:25,823 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:32:25,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,870 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:32:25,871 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:25,917 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:25,918 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:32:25,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:25,963 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:32:25,964 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,012 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:26,013 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:32:26,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,049 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,050 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,051 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,052 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,053 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,059 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:26,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,061 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:32:26,062 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,115 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:26,115 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:32:26,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,147 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,150 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,151 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,154 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,156 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,159 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:26,160 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:26,161 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2018-12-24 14:32:26,161 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:26,212 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. [2018-12-24 14:32:26,213 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2018-12-24 14:32:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:26,239 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:26,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:26,313 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:32:26,313 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:26,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:32:26,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:32:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:32:26,314 INFO L87 Difference]: Start difference. First operand 948 states and 6467 transitions. Second operand 12 states. [2018-12-24 14:32:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:27,706 INFO L93 Difference]: Finished difference Result 1059 states and 6958 transitions. [2018-12-24 14:32:27,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:32:27,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:32:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:27,712 INFO L225 Difference]: With dead ends: 1059 [2018-12-24 14:32:27,712 INFO L226 Difference]: Without dead ends: 1057 [2018-12-24 14:32:27,713 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:32:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2018-12-24 14:32:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 945. [2018-12-24 14:32:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 945 states. [2018-12-24 14:32:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 6457 transitions. [2018-12-24 14:32:28,134 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 6457 transitions. Word has length 6 [2018-12-24 14:32:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:28,134 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 6457 transitions. [2018-12-24 14:32:28,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:32:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 6457 transitions. [2018-12-24 14:32:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:28,136 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:28,136 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:28,136 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 908367452, now seen corresponding path program 1 times [2018-12-24 14:32:28,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:28,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:28,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:28,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:28,137 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:28,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:28,264 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:28,264 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:28,264 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [27] [2018-12-24 14:32:28,265 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:28,265 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:28,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:28,628 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:32:28,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:28,628 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:28,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:28,628 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:28,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:28,668 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:28,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:28,701 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 21 treesize of output 24 [2018-12-24 14:32:28,707 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 24 treesize of output 30 [2018-12-24 14:32:28,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,715 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,716 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 26 treesize of output 40 [2018-12-24 14:32:28,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,724 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 28 treesize of output 54 [2018-12-24 14:32:28,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,732 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 30 treesize of output 72 [2018-12-24 14:32:28,740 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:32:28,741 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,772 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,796 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,814 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,828 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,842 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:28,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,872 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 48 treesize of output 54 [2018-12-24 14:32:28,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,905 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 41 treesize of output 53 [2018-12-24 14:32:28,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,944 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,945 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 32 treesize of output 61 [2018-12-24 14:32:28,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,994 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,995 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,996 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:28,997 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:32:28,997 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,015 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,030 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,047 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,080 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:29,081 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2018-12-24 14:32:29,149 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:32:29,150 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,179 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:29,179 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:32:29,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,218 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:32:29,219 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,251 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:29,251 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:38 [2018-12-24 14:32:29,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,287 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:29,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:32:29,290 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,326 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:29,326 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2018-12-24 14:32:29,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,352 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,353 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,354 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,359 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:29,363 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:29,364 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2018-12-24 14:32:29,364 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:29,398 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:29,399 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2018-12-24 14:32:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:29,419 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:29,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:29,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:32:29,515 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:29,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:32:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:32:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:32:29,515 INFO L87 Difference]: Start difference. First operand 945 states and 6457 transitions. Second operand 12 states. [2018-12-24 14:32:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:32,055 INFO L93 Difference]: Finished difference Result 1044 states and 6871 transitions. [2018-12-24 14:32:32,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:32,055 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:32:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:32,060 INFO L225 Difference]: With dead ends: 1044 [2018-12-24 14:32:32,060 INFO L226 Difference]: Without dead ends: 1042 [2018-12-24 14:32:32,061 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:32:32,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-12-24 14:32:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 982. [2018-12-24 14:32:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2018-12-24 14:32:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 6716 transitions. [2018-12-24 14:32:32,545 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 6716 transitions. Word has length 6 [2018-12-24 14:32:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:32,545 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 6716 transitions. [2018-12-24 14:32:32,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:32:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 6716 transitions. [2018-12-24 14:32:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:32,547 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:32,547 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:32,547 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:32,548 INFO L82 PathProgramCache]: Analyzing trace with hash 908371606, now seen corresponding path program 2 times [2018-12-24 14:32:32,548 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:32,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:32,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:32,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:32,548 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:32,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:32,701 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:32,701 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:32:32,701 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:32:32,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:32,701 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:32,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:32:32,712 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:32:32,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:32:32,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:32:32,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:32,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,751 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:32:32,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:32:32,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,837 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,838 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,840 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:32:32,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,897 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:32:32,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,964 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:32,972 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:32:32,973 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,001 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,029 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,055 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,084 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,122 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 21 treesize of output 24 [2018-12-24 14:32:33,125 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:32:33,129 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:32:33,131 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:33,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:32:33,138 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:32:33,138 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,175 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,199 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,225 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,239 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,250 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,296 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:33,297 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:32:33,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,345 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:32:33,345 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,392 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:33,392 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:32:33,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,432 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,437 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,439 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,440 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:32:33,441 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,490 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:33,490 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:32:33,524 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,531 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,533 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,539 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:33,540 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:32:33,540 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,595 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:33,595 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2018-12-24 14:32:33,624 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,625 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,627 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,628 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,629 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,638 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:33,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:33,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:32:33,641 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:33,694 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. [2018-12-24 14:32:33,694 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2018-12-24 14:32:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:33,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:34,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:34,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:32:34,018 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:34,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:32:34,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:32:34,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:32:34,018 INFO L87 Difference]: Start difference. First operand 982 states and 6716 transitions. Second operand 12 states. [2018-12-24 14:32:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:35,435 INFO L93 Difference]: Finished difference Result 1044 states and 6839 transitions. [2018-12-24 14:32:35,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:32:35,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:32:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:35,440 INFO L225 Difference]: With dead ends: 1044 [2018-12-24 14:32:35,441 INFO L226 Difference]: Without dead ends: 1041 [2018-12-24 14:32:35,441 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:32:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2018-12-24 14:32:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 980. [2018-12-24 14:32:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2018-12-24 14:32:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 6702 transitions. [2018-12-24 14:32:35,921 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 6702 transitions. Word has length 6 [2018-12-24 14:32:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:35,921 INFO L480 AbstractCegarLoop]: Abstraction has 980 states and 6702 transitions. [2018-12-24 14:32:35,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:32:35,921 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 6702 transitions. [2018-12-24 14:32:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:35,923 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:35,923 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:35,923 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 908017958, now seen corresponding path program 1 times [2018-12-24 14:32:35,924 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:35,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:35,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:32:35,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:35,924 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:36,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:36,043 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:36,043 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:36,044 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [27] [2018-12-24 14:32:36,045 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:36,045 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:36,473 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:36,473 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:32:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:36,473 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:36,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:36,474 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:36,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:36,482 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:36,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:36,522 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 21 treesize of output 24 [2018-12-24 14:32:36,524 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 24 treesize of output 30 [2018-12-24 14:32:36,532 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,535 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:32:36,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:36,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:32:36,571 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:32:36,571 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,601 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,624 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,642 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,658 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,672 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,701 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:32:36,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,736 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:32:36,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,777 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 32 treesize of output 61 [2018-12-24 14:32:36,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:36,829 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:32:36,829 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,866 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,882 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,899 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:36,933 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:36,933 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:32:37,047 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,056 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:32:37,057 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:37,168 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:32:37,168 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:106 [2018-12-24 14:32:37,294 WARN L181 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2018-12-24 14:32:37,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,312 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:37,321 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 93 [2018-12-24 14:32:37,322 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:37,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,482 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:37,482 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 80 [2018-12-24 14:32:37,483 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:37,570 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 3 xjuncts. [2018-12-24 14:32:37,571 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:135 [2018-12-24 14:32:37,696 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,698 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,699 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,700 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,710 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,720 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 95 [2018-12-24 14:32:37,722 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:37,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,896 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:37,903 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 93 [2018-12-24 14:32:37,903 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,031 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,036 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 86 [2018-12-24 14:32:38,036 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,138 INFO L267 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 3 dim-1 vars, End of recursive call: 14 dim-0 vars, and 4 xjuncts. [2018-12-24 14:32:38,138 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 14 variables, input treesize:165, output treesize:147 [2018-12-24 14:32:38,275 WARN L181 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2018-12-24 14:32:38,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,290 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,292 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,296 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 102 [2018-12-24 14:32:38,297 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,436 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,438 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,442 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,443 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,443 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:38,444 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,461 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 118 [2018-12-24 14:32:38,463 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2018-12-24 14:32:38,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,758 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:38,758 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 92 [2018-12-24 14:32:38,759 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:38,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:38,922 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:38,922 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 98 [2018-12-24 14:32:38,923 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:39,067 INFO L267 ElimStorePlain]: Start of recursive call 1: 17 dim-0 vars, 4 dim-1 vars, End of recursive call: 25 dim-0 vars, and 6 xjuncts. [2018-12-24 14:32:39,067 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 21 variables, input treesize:190, output treesize:230 [2018-12-24 14:32:46,840 WARN L181 SmtUtils]: Spent 7.73 s on a formula simplification. DAG size of input: 157 DAG size of output: 103 [2018-12-24 14:32:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:46,843 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:46,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:46,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:32:46,967 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:46,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:32:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:32:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:32:46,967 INFO L87 Difference]: Start difference. First operand 980 states and 6702 transitions. Second operand 12 states. [2018-12-24 14:32:47,180 WARN L181 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-12-24 14:32:47,479 WARN L181 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2018-12-24 14:32:47,930 WARN L181 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2018-12-24 14:32:48,455 WARN L181 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2018-12-24 14:32:49,020 WARN L181 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2018-12-24 14:32:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:49,988 INFO L93 Difference]: Finished difference Result 1104 states and 7131 transitions. [2018-12-24 14:32:49,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:32:49,989 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:32:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:49,994 INFO L225 Difference]: With dead ends: 1104 [2018-12-24 14:32:49,994 INFO L226 Difference]: Without dead ends: 1102 [2018-12-24 14:32:49,994 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2018-12-24 14:32:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2018-12-24 14:32:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 984. [2018-12-24 14:32:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2018-12-24 14:32:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 6730 transitions. [2018-12-24 14:32:50,486 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 6730 transitions. Word has length 6 [2018-12-24 14:32:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:50,486 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 6730 transitions. [2018-12-24 14:32:50,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:32:50,486 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 6730 transitions. [2018-12-24 14:32:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:50,488 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:50,488 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:50,488 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 908017524, now seen corresponding path program 1 times [2018-12-24 14:32:50,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:50,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:50,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:50,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:50,490 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:50,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:50,572 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:50,572 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:50,572 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [27] [2018-12-24 14:32:50,573 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:50,573 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:50,987 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:50,987 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:32:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:50,988 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:50,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:50,988 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:50,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:50,998 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:51,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:51,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,035 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 48 treesize of output 54 [2018-12-24 14:32:51,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,079 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 41 treesize of output 53 [2018-12-24 14:32:51,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,128 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 61 [2018-12-24 14:32:51,173 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,174 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,182 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:32:51,182 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,203 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,226 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,249 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,281 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:32:51,283 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:32:51,286 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:32:51,289 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:32:51,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:32:51,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:32:51,301 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,327 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,348 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,364 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,378 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,391 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,425 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:51,425 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:32:51,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,483 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:32:51,483 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,514 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:51,514 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:32:51,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,546 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:51,547 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:32:51,548 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,581 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:51,581 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:42 [2018-12-24 14:32:51,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,612 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,613 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,614 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,615 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:32:51,615 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,646 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:51,646 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2018-12-24 14:32:51,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,672 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,680 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:51,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:51,682 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2018-12-24 14:32:51,682 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:51,716 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:51,717 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:34 [2018-12-24 14:32:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:51,738 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:51,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:51,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:32:51,804 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:51,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:32:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:32:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:32:51,805 INFO L87 Difference]: Start difference. First operand 984 states and 6730 transitions. Second operand 12 states. [2018-12-24 14:32:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:54,560 INFO L93 Difference]: Finished difference Result 1313 states and 8698 transitions. [2018-12-24 14:32:54,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:32:54,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:32:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:54,567 INFO L225 Difference]: With dead ends: 1313 [2018-12-24 14:32:54,567 INFO L226 Difference]: Without dead ends: 1312 [2018-12-24 14:32:54,568 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:32:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2018-12-24 14:32:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 839. [2018-12-24 14:32:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 839 states. [2018-12-24 14:32:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 5721 transitions. [2018-12-24 14:32:55,055 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 5721 transitions. Word has length 6 [2018-12-24 14:32:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:55,056 INFO L480 AbstractCegarLoop]: Abstraction has 839 states and 5721 transitions. [2018-12-24 14:32:55,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:32:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 5721 transitions. [2018-12-24 14:32:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:55,057 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:55,058 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:55,058 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash 908550478, now seen corresponding path program 1 times [2018-12-24 14:32:55,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:55,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:55,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:55,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:55,059 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:55,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:55,147 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:55,148 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:55,148 INFO L207 CegarAbsIntRunner]: [0], [14], [22], [24], [28], [29] [2018-12-24 14:32:55,149 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:55,149 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:55,502 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:55,502 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:32:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:55,502 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:55,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:55,502 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:55,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:55,511 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:55,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:55,520 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 21 treesize of output 24 [2018-12-24 14:32:55,528 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 24 treesize of output 26 [2018-12-24 14:32:55,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,539 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 26 treesize of output 36 [2018-12-24 14:32:55,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:32:55,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,567 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:32:55,571 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,573 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:55,584 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:32:55,584 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,079 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,106 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,124 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,138 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,152 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,181 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 63 treesize of output 56 [2018-12-24 14:32:56,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,200 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 53 treesize of output 63 [2018-12-24 14:32:56,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:32:56,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,306 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,307 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,312 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,313 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 37 treesize of output 76 [2018-12-24 14:32:56,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,375 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,376 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,377 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,379 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,383 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,383 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:32:56,384 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,407 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,431 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,457 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,484 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,529 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:56,529 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:32:56,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,563 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:32:56,563 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,607 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:56,607 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:32:56,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,639 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,640 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,647 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 107 [2018-12-24 14:32:56,648 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,693 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:56,694 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:51 [2018-12-24 14:32:56,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,785 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:56,794 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:56,795 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:32:56,796 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:56,844 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. [2018-12-24 14:32:56,845 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:45 [2018-12-24 14:32:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:56,875 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:56,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:56,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:32:56,935 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:56,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:32:56,936 INFO L87 Difference]: Start difference. First operand 839 states and 5721 transitions. Second operand 10 states. [2018-12-24 14:32:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:32:57,993 INFO L93 Difference]: Finished difference Result 881 states and 5780 transitions. [2018-12-24 14:32:57,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:32:57,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:32:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:32:57,997 INFO L225 Difference]: With dead ends: 881 [2018-12-24 14:32:57,997 INFO L226 Difference]: Without dead ends: 880 [2018-12-24 14:32:57,997 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:32:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2018-12-24 14:32:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 841. [2018-12-24 14:32:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 841 states. [2018-12-24 14:32:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 5735 transitions. [2018-12-24 14:32:58,480 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 5735 transitions. Word has length 6 [2018-12-24 14:32:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:32:58,481 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 5735 transitions. [2018-12-24 14:32:58,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:32:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 5735 transitions. [2018-12-24 14:32:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:32:58,482 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:32:58,483 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:32:58,483 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:32:58,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash 908133404, now seen corresponding path program 1 times [2018-12-24 14:32:58,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:32:58,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:58,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:58,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:32:58,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:32:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:58,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:58,608 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:32:58,608 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:32:58,608 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [22], [28], [29] [2018-12-24 14:32:58,609 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:32:58,609 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:32:58,946 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:32:58,947 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:32:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:32:58,947 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:32:58,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:32:58,947 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:32:58,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:32:58,955 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:32:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:32:58,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:32:58,970 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 21 treesize of output 24 [2018-12-24 14:32:58,974 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 24 treesize of output 26 [2018-12-24 14:32:58,981 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,984 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 26 treesize of output 36 [2018-12-24 14:32:58,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:58,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:32:59,001 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,010 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 30 treesize of output 68 [2018-12-24 14:32:59,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:32:59,027 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,067 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,087 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,103 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,115 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,129 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,150 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:32:59,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,169 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 36 treesize of output 49 [2018-12-24 14:32:59,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,207 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 32 treesize of output 57 [2018-12-24 14:32:59,245 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,246 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,247 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,253 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:32:59,253 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,268 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,283 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,300 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,331 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:59,331 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:32:59,372 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,373 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 68 [2018-12-24 14:32:59,373 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,401 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:59,401 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:46 [2018-12-24 14:32:59,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,430 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,439 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:32:59,440 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:32:59,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:32:59,567 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:72 [2018-12-24 14:32:59,605 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,609 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,610 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,611 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:32:59,612 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:32:59,613 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 77 [2018-12-24 14:32:59,613 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:32:59,636 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:32:59,636 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:27 [2018-12-24 14:32:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:59,916 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:32:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:32:59,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:32:59,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:32:59,960 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:32:59,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:32:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:32:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:32:59,960 INFO L87 Difference]: Start difference. First operand 841 states and 5735 transitions. Second operand 10 states. [2018-12-24 14:33:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:01,343 INFO L93 Difference]: Finished difference Result 1415 states and 9444 transitions. [2018-12-24 14:33:01,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:33:01,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:33:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:01,349 INFO L225 Difference]: With dead ends: 1415 [2018-12-24 14:33:01,349 INFO L226 Difference]: Without dead ends: 1413 [2018-12-24 14:33:01,350 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:33:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2018-12-24 14:33:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1280. [2018-12-24 14:33:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2018-12-24 14:33:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 8838 transitions. [2018-12-24 14:33:02,162 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 8838 transitions. Word has length 6 [2018-12-24 14:33:02,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:02,163 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 8838 transitions. [2018-12-24 14:33:02,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:33:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 8838 transitions. [2018-12-24 14:33:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:02,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:02,166 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:02,166 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 909988134, now seen corresponding path program 1 times [2018-12-24 14:33:02,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:02,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:02,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:02,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:02,167 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:02,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:02,284 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:02,284 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:33:02,284 INFO L207 CegarAbsIntRunner]: [0], [10], [22], [24], [28], [29] [2018-12-24 14:33:02,286 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:02,286 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:02,634 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:02,634 INFO L272 AbstractInterpreter]: Visited 6 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:33:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:02,635 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:02,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:02,635 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:02,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:02,644 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:02,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:02,653 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 43 treesize of output 39 [2018-12-24 14:33:02,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,676 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 36 treesize of output 49 [2018-12-24 14:33:02,810 WARN L181 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2018-12-24 14:33:02,814 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,820 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 32 treesize of output 57 [2018-12-24 14:33:02,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:02,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:33:02,869 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,886 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,901 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,919 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,943 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:33:02,948 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:33:02,951 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:33:02,954 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:33:02,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:33:02,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:33:02,969 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:02,993 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,013 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,028 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,040 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,051 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:03,083 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:03,084 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:33:03,320 WARN L181 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2018-12-24 14:33:03,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,377 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:33:03,382 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 32 xjuncts. [2018-12-24 14:33:03,782 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 21 dim-0 vars, and 7 xjuncts. [2018-12-24 14:33:03,783 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:373 [2018-12-24 14:33:03,933 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 80 [2018-12-24 14:33:03,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,942 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:03,946 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:03,955 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 93 [2018-12-24 14:33:03,956 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:33:04,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 57 [2018-12-24 14:33:04,126 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:04,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,230 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:04,239 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 87 [2018-12-24 14:33:04,240 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2018-12-24 14:33:04,395 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 12 dim-0 vars, and 5 xjuncts. [2018-12-24 14:33:04,396 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 11 variables, input treesize:174, output treesize:180 [2018-12-24 14:33:04,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,505 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,507 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,508 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,509 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,510 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 71 [2018-12-24 14:33:04,510 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:04,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,583 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 69 [2018-12-24 14:33:04,584 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:04,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,644 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,645 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:04,647 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:04,648 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2018-12-24 14:33:04,648 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:04,697 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 9 dim-0 vars, and 3 xjuncts. [2018-12-24 14:33:04,697 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 12 variables, input treesize:132, output treesize:92 [2018-12-24 14:33:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:04,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:04,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:04,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:33:04,822 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:04,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:33:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:33:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:33:04,823 INFO L87 Difference]: Start difference. First operand 1280 states and 8838 transitions. Second operand 10 states. [2018-12-24 14:33:05,437 WARN L181 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-12-24 14:33:06,215 WARN L181 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-12-24 14:33:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:07,163 INFO L93 Difference]: Finished difference Result 1381 states and 9127 transitions. [2018-12-24 14:33:07,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:33:07,163 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:33:07,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:07,168 INFO L225 Difference]: With dead ends: 1381 [2018-12-24 14:33:07,168 INFO L226 Difference]: Without dead ends: 1379 [2018-12-24 14:33:07,169 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:33:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2018-12-24 14:33:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1274. [2018-12-24 14:33:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2018-12-24 14:33:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2018-12-24 14:33:07,983 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2018-12-24 14:33:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:07,983 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2018-12-24 14:33:07,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:33:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2018-12-24 14:33:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:07,986 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:07,987 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:07,987 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:07,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:07,987 INFO L82 PathProgramCache]: Analyzing trace with hash 909993964, now seen corresponding path program 1 times [2018-12-24 14:33:07,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:07,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:07,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:07,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:07,988 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:33:08,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:08,042 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:08,042 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:33:08,043 INFO L207 CegarAbsIntRunner]: [0], [10], [24], [28], [30], [31] [2018-12-24 14:33:08,045 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:08,045 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:08,695 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:08,696 INFO L272 AbstractInterpreter]: Visited 6 different actions 12 times. Merged at 2 different actions 2 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:33:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:08,696 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:08,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:08,696 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:08,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:08,705 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:08,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:08,716 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 63 treesize of output 56 [2018-12-24 14:33:08,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,755 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:33:08,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,802 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 46 treesize of output 68 [2018-12-24 14:33:08,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,849 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,856 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 37 treesize of output 76 [2018-12-24 14:33:08,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:08,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:33:08,930 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:08,955 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:08,990 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,017 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,045 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,080 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:33:09,108 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:33:09,111 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:33:09,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:33:09,122 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:33:09,126 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:33:09,127 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,166 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,186 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,201 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,212 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,224 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,267 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:09,268 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:33:09,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,293 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:33:09,294 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:09,338 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:09,339 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:33:09,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,370 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,371 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:09,371 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:09,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:33:09,382 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:33:09,535 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:33:09,535 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:79, output treesize:110 [2018-12-24 14:33:09,832 WARN L181 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2018-12-24 14:33:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:09,835 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:09,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:09,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:33:09,879 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:09,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:33:09,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:33:09,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:33:09,880 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 8 states. [2018-12-24 14:33:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:11,106 INFO L93 Difference]: Finished difference Result 1306 states and 8833 transitions. [2018-12-24 14:33:11,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:33:11,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:33:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:11,112 INFO L225 Difference]: With dead ends: 1306 [2018-12-24 14:33:11,113 INFO L226 Difference]: Without dead ends: 1305 [2018-12-24 14:33:11,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:33:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2018-12-24 14:33:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 1274. [2018-12-24 14:33:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1274 states. [2018-12-24 14:33:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 8796 transitions. [2018-12-24 14:33:11,966 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 8796 transitions. Word has length 6 [2018-12-24 14:33:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:11,966 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 8796 transitions. [2018-12-24 14:33:11,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:33:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 8796 transitions. [2018-12-24 14:33:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:11,969 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:11,969 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:11,969 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash 909980134, now seen corresponding path program 1 times [2018-12-24 14:33:11,969 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:11,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:11,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:11,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:11,970 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:12,131 WARN L181 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2018-12-24 14:33:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:12,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:12,187 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:12,187 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:33:12,187 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [24], [27] [2018-12-24 14:33:12,188 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:12,188 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:12,627 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:12,627 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:33:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:12,627 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:12,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:12,628 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:12,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:12,636 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:12,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:12,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:33:12,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,725 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:33:12,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,771 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:33:12,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:33:12,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,900 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,901 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,902 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,906 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:12,907 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:33:12,907 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:12,936 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:12,963 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:12,992 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,020 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,055 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 21 treesize of output 24 [2018-12-24 14:33:13,058 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:33:13,077 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:33:13,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:33:13,083 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:33:13,086 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:33:13,087 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,124 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,145 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,162 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,174 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,187 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,234 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:13,235 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:33:13,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,280 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:33:13,280 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,326 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:13,327 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:33:13,361 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,369 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,369 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:13,370 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 112 [2018-12-24 14:33:13,371 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,420 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:13,420 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:59 [2018-12-24 14:33:13,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,456 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 115 [2018-12-24 14:33:13,466 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,516 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:13,517 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:51 [2018-12-24 14:33:13,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,562 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:13,569 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:13,570 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2018-12-24 14:33:13,570 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:13,620 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. [2018-12-24 14:33:13,620 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:49 [2018-12-24 14:33:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:13,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:13,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:13,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:33:13,735 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:13,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:33:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:33:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:33:13,735 INFO L87 Difference]: Start difference. First operand 1274 states and 8796 transitions. Second operand 12 states. [2018-12-24 14:33:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:15,395 INFO L93 Difference]: Finished difference Result 1360 states and 9097 transitions. [2018-12-24 14:33:15,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:33:15,395 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:33:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:15,401 INFO L225 Difference]: With dead ends: 1360 [2018-12-24 14:33:15,401 INFO L226 Difference]: Without dead ends: 1358 [2018-12-24 14:33:15,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:33:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2018-12-24 14:33:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1309. [2018-12-24 14:33:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2018-12-24 14:33:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 9030 transitions. [2018-12-24 14:33:16,240 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 9030 transitions. Word has length 6 [2018-12-24 14:33:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:16,240 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 9030 transitions. [2018-12-24 14:33:16,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:33:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 9030 transitions. [2018-12-24 14:33:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:16,243 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:16,243 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:16,243 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash 896939676, now seen corresponding path program 2 times [2018-12-24 14:33:16,244 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:16,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:16,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:16,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:16,244 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:33:16,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:16,339 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:16,339 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:33:16,339 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:33:16,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:16,339 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:16,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:33:16,350 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:33:16,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:33:16,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:33:16,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:16,381 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,381 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:33:16,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,421 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:33:16,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:33:16,512 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,514 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,519 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:33:16,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:16,589 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:33:16,589 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:16,615 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:16,989 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,156 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,184 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,218 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 21 treesize of output 24 [2018-12-24 14:33:17,221 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:33:17,224 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:33:17,226 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:33:17,228 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:33:17,231 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:33:17,231 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,266 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,286 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,301 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,314 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,326 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,370 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:17,371 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:92, output treesize:91 [2018-12-24 14:33:17,399 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,400 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:33:17,400 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:17,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:33:17,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,475 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,476 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:33:17,477 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,523 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:17,523 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:83, output treesize:57 [2018-12-24 14:33:17,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,554 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,555 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,556 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,557 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:17,561 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:17,562 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:33:17,562 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:17,609 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. [2018-12-24 14:33:17,610 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:67, output treesize:49 [2018-12-24 14:33:17,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:17,632 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:17,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:17,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:33:17,687 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:17,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:33:17,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:33:17,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:33:17,688 INFO L87 Difference]: Start difference. First operand 1309 states and 9030 transitions. Second operand 10 states. [2018-12-24 14:33:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:19,538 INFO L93 Difference]: Finished difference Result 1898 states and 12744 transitions. [2018-12-24 14:33:19,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:33:19,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:33:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:19,544 INFO L225 Difference]: With dead ends: 1898 [2018-12-24 14:33:19,544 INFO L226 Difference]: Without dead ends: 1896 [2018-12-24 14:33:19,545 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:33:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2018-12-24 14:33:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1669. [2018-12-24 14:33:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2018-12-24 14:33:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 11590 transitions. [2018-12-24 14:33:20,772 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 11590 transitions. Word has length 6 [2018-12-24 14:33:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:20,772 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 11590 transitions. [2018-12-24 14:33:20,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:33:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 11590 transitions. [2018-12-24 14:33:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:20,777 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:20,777 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:20,777 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 897602894, now seen corresponding path program 1 times [2018-12-24 14:33:20,777 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:20,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:20,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:33:20,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:20,778 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:33:20,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-24 14:33:20,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-24 14:33:20,873 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-24 14:33:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-24 14:33:20,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-24 14:33:20,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-24 14:33:20,874 INFO L87 Difference]: Start difference. First operand 1669 states and 11590 transitions. Second operand 5 states. [2018-12-24 14:33:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:22,068 INFO L93 Difference]: Finished difference Result 1693 states and 11616 transitions. [2018-12-24 14:33:22,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-24 14:33:22,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-12-24 14:33:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:22,073 INFO L225 Difference]: With dead ends: 1693 [2018-12-24 14:33:22,073 INFO L226 Difference]: Without dead ends: 1692 [2018-12-24 14:33:22,074 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-12-24 14:33:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2018-12-24 14:33:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1672. [2018-12-24 14:33:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2018-12-24 14:33:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 11593 transitions. [2018-12-24 14:33:23,301 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 11593 transitions. Word has length 6 [2018-12-24 14:33:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:23,301 INFO L480 AbstractCegarLoop]: Abstraction has 1672 states and 11593 transitions. [2018-12-24 14:33:23,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-24 14:33:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 11593 transitions. [2018-12-24 14:33:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:23,304 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:23,304 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:23,305 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash 900997082, now seen corresponding path program 1 times [2018-12-24 14:33:23,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:23,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:23,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:23,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:23,306 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:23,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:23,354 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:23,354 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:33:23,354 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [28], [30], [31] [2018-12-24 14:33:23,355 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:23,355 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:23,604 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:23,604 INFO L272 AbstractInterpreter]: Visited 6 different actions 9 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:33:23,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:23,604 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:23,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:23,605 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:23,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:23,613 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:23,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:23,641 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 21 treesize of output 24 [2018-12-24 14:33:23,645 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:33:23,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,655 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 26 treesize of output 36 [2018-12-24 14:33:23,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,662 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:33:23,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,669 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,673 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:33:23,678 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,679 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,681 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,683 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:33:23,684 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:23,724 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:23,745 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:23,761 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:23,778 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:23,791 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:23,816 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 63 treesize of output 56 [2018-12-24 14:33:23,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,835 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 53 treesize of output 63 [2018-12-24 14:33:23,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,877 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 46 treesize of output 68 [2018-12-24 14:33:23,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,930 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:33:23,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,993 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:23,994 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:33:23,994 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,018 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,041 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,065 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,090 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,130 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. [2018-12-24 14:33:24,131 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:84, output treesize:87 [2018-12-24 14:33:24,152 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:33:24,153 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,195 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:24,196 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:33:24,217 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:24,227 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 99 [2018-12-24 14:33:24,228 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:24,270 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. [2018-12-24 14:33:24,271 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:77, output treesize:51 [2018-12-24 14:33:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:24,287 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:24,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:24,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:33:24,317 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:24,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:33:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:33:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:33:24,318 INFO L87 Difference]: Start difference. First operand 1672 states and 11593 transitions. Second operand 8 states. [2018-12-24 14:33:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:26,609 INFO L93 Difference]: Finished difference Result 2759 states and 18997 transitions. [2018-12-24 14:33:26,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:33:26,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 6 [2018-12-24 14:33:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:26,618 INFO L225 Difference]: With dead ends: 2759 [2018-12-24 14:33:26,618 INFO L226 Difference]: Without dead ends: 2757 [2018-12-24 14:33:26,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:33:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-12-24 14:33:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2639. [2018-12-24 14:33:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2639 states. [2018-12-24 14:33:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 18434 transitions. [2018-12-24 14:33:28,555 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 18434 transitions. Word has length 6 [2018-12-24 14:33:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:28,556 INFO L480 AbstractCegarLoop]: Abstraction has 2639 states and 18434 transitions. [2018-12-24 14:33:28,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:33:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 18434 transitions. [2018-12-24 14:33:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:28,560 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:28,560 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:28,560 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:28,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 900629790, now seen corresponding path program 1 times [2018-12-24 14:33:28,561 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:28,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:28,561 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:28,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:28,668 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:28,669 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 7 with the following transitions: [2018-12-24 14:33:28,669 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [27] [2018-12-24 14:33:28,672 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:28,672 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:29,039 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:29,039 INFO L272 AbstractInterpreter]: Visited 6 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:33:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:29,039 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:29,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:29,040 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:29,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:29,048 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:29,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:29,097 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 21 treesize of output 24 [2018-12-24 14:33:29,099 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 24 treesize of output 30 [2018-12-24 14:33:29,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,106 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 26 treesize of output 40 [2018-12-24 14:33:29,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,116 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:33:29,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,125 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,125 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 30 treesize of output 72 [2018-12-24 14:33:29,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,137 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:33:29,137 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,177 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,199 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,217 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,231 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,243 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:33:29,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,313 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:33:29,355 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,356 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,357 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,358 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,359 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:33:29,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,412 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:33:29,477 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,485 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:33:29,486 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,510 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,534 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,559 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,587 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,630 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:29,631 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:33:29,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,667 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:33:29,668 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,710 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:29,711 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:33:29,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,811 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,833 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,835 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:29,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:33:29,836 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,880 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:29,881 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2018-12-24 14:33:29,908 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,910 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,911 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:29,920 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:33:29,920 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:29,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:29,978 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2018-12-24 14:33:30,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,005 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,007 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,017 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:30,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:30,019 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:33:30,020 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:30,069 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. [2018-12-24 14:33:30,069 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2018-12-24 14:33:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:30,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:30,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:30,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:33:30,161 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:30,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:33:30,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:33:30,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:33:30,161 INFO L87 Difference]: Start difference. First operand 2639 states and 18434 transitions. Second operand 12 states. [2018-12-24 14:33:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:34,050 INFO L93 Difference]: Finished difference Result 3636 states and 24951 transitions. [2018-12-24 14:33:34,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:33:34,050 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 6 [2018-12-24 14:33:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:34,063 INFO L225 Difference]: With dead ends: 3636 [2018-12-24 14:33:34,063 INFO L226 Difference]: Without dead ends: 3626 [2018-12-24 14:33:34,064 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:33:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3626 states. [2018-12-24 14:33:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 2790. [2018-12-24 14:33:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2790 states. [2018-12-24 14:33:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 19490 transitions. [2018-12-24 14:33:36,882 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 19490 transitions. Word has length 6 [2018-12-24 14:33:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:36,882 INFO L480 AbstractCegarLoop]: Abstraction has 2790 states and 19490 transitions. [2018-12-24 14:33:36,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:33:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 19490 transitions. [2018-12-24 14:33:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-24 14:33:36,887 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:36,887 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-12-24 14:33:36,887 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash 900752924, now seen corresponding path program 2 times [2018-12-24 14:33:36,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:36,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:36,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:36,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:36,888 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:36,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:36,947 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:36,947 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:33:36,947 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:33:36,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:36,947 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:36,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:33:36,957 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:33:36,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:33:36,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:33:36,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:36,967 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:33:36,972 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 24 treesize of output 26 [2018-12-24 14:33:36,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:36,978 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:36,978 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 26 treesize of output 36 [2018-12-24 14:33:36,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:36,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:36,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:36,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:33:36,997 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,003 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,006 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,008 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 30 treesize of output 68 [2018-12-24 14:33:37,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,020 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:33:37,021 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,060 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,080 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,096 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,109 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,122 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:33:37,166 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,169 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 53 treesize of output 63 [2018-12-24 14:33:37,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,211 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 46 treesize of output 68 [2018-12-24 14:33:37,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,259 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,263 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 37 treesize of output 76 [2018-12-24 14:33:37,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,326 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,327 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,328 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,329 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:33:37,329 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,353 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,376 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,400 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,425 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,467 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:37,467 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:33:37,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,495 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 93 [2018-12-24 14:33:37,495 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:37,536 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:37,536 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:33:37,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,560 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,561 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,563 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:37,576 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:33:37,577 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:33:37,720 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:33:37,720 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:98 [2018-12-24 14:33:40,258 WARN L181 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2018-12-24 14:33:40,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,263 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:40,270 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:40,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:33:40,271 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:40,305 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:40,306 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:36 [2018-12-24 14:33:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:40,324 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:40,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:40,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:33:40,367 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:40,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:33:40,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:33:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:33:40,368 INFO L87 Difference]: Start difference. First operand 2790 states and 19490 transitions. Second operand 10 states. [2018-12-24 14:33:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:44,845 INFO L93 Difference]: Finished difference Result 4300 states and 29900 transitions. [2018-12-24 14:33:44,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:33:44,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-12-24 14:33:44,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:44,860 INFO L225 Difference]: With dead ends: 4300 [2018-12-24 14:33:44,860 INFO L226 Difference]: Without dead ends: 4298 [2018-12-24 14:33:44,862 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:33:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2018-12-24 14:33:49,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4076. [2018-12-24 14:33:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4076 states. [2018-12-24 14:33:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 28660 transitions. [2018-12-24 14:33:49,329 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 28660 transitions. Word has length 6 [2018-12-24 14:33:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:49,329 INFO L480 AbstractCegarLoop]: Abstraction has 4076 states and 28660 transitions. [2018-12-24 14:33:49,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:33:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 28660 transitions. [2018-12-24 14:33:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:33:49,336 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:49,336 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:33:49,336 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2030611754, now seen corresponding path program 1 times [2018-12-24 14:33:49,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:49,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:49,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:33:49,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:49,337 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:33:49,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:49,403 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:33:49,403 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:33:49,403 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [22], [24], [28], [29] [2018-12-24 14:33:49,404 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:33:49,404 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:33:49,825 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:33:49,825 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:33:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:49,825 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:33:49,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:33:49,825 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:33:49,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:49,833 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:33:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:33:49,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:33:49,864 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 21 treesize of output 24 [2018-12-24 14:33:49,867 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 24 treesize of output 30 [2018-12-24 14:33:49,875 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,878 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:33:49,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,890 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:33:49,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,895 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,897 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,899 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,900 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 30 treesize of output 72 [2018-12-24 14:33:49,909 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:49,921 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:33:49,922 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:49,963 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:49,986 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,004 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,017 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,030 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:33:50,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,101 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:33:50,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,145 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:33:50,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,203 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:33:50,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,273 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:33:50,274 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,298 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,323 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,348 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,373 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,417 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:50,417 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:33:50,459 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,460 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:33:50,461 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,502 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:50,502 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:33:50,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,546 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:33:50,546 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,594 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:50,594 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:33:50,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,653 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,654 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,655 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,656 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,657 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,660 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,665 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:50,666 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 119 [2018-12-24 14:33:50,666 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,714 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:33:50,714 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2018-12-24 14:33:50,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,747 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,749 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,750 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,751 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,752 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,753 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,754 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,756 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,757 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,761 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:33:50,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:33:50,763 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:33:50,763 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:33:50,811 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. [2018-12-24 14:33:50,811 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:43 [2018-12-24 14:33:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:50,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:33:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:33:50,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:33:50,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2018-12-24 14:33:50,915 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:33:50,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:33:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:33:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:33:50,916 INFO L87 Difference]: Start difference. First operand 4076 states and 28660 transitions. Second operand 11 states. [2018-12-24 14:33:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:33:55,623 INFO L93 Difference]: Finished difference Result 4236 states and 29539 transitions. [2018-12-24 14:33:55,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:33:55,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:33:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:33:55,638 INFO L225 Difference]: With dead ends: 4236 [2018-12-24 14:33:55,638 INFO L226 Difference]: Without dead ends: 4233 [2018-12-24 14:33:55,639 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:33:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2018-12-24 14:33:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 4163. [2018-12-24 14:33:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4163 states. [2018-12-24 14:33:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 29269 transitions. [2018-12-24 14:33:59,977 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 29269 transitions. Word has length 7 [2018-12-24 14:33:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:33:59,977 INFO L480 AbstractCegarLoop]: Abstraction has 4163 states and 29269 transitions. [2018-12-24 14:33:59,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:33:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 29269 transitions. [2018-12-24 14:33:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:33:59,984 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:33:59,984 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:33:59,984 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:33:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:33:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2030621364, now seen corresponding path program 1 times [2018-12-24 14:33:59,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:33:59,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:59,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:33:59,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:33:59,985 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:33:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:34:00,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:00,086 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:34:00,087 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:34:00,087 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [22], [28], [29] [2018-12-24 14:34:00,087 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:34:00,088 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:34:00,484 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:34:00,484 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:34:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:00,484 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:34:00,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:00,485 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:34:00,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:00,495 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:34:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:00,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:34:00,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,525 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:34:00,558 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,559 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,560 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 41 treesize of output 53 [2018-12-24 14:34:00,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,602 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,603 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 32 treesize of output 61 [2018-12-24 14:34:00,647 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,650 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,652 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,653 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:34:00,654 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,670 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,686 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,702 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,724 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:34:00,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:34:00,729 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:34:00,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:34:00,734 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 30 treesize of output 72 [2018-12-24 14:34:00,741 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:34:00,742 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,767 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,787 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,802 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,814 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,826 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:00,857 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:72, output treesize:71 [2018-12-24 14:34:00,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:00,923 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:34:00,923 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:00,949 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:00,950 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:34:01,124 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-12-24 14:34:01,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,128 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,134 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:34:01,134 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:01,164 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:01,165 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:34:01,192 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,194 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,195 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,196 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,204 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:01,205 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 94 [2018-12-24 14:34:01,205 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:01,239 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:01,240 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2018-12-24 14:34:01,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,266 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,268 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,269 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:01,275 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:01,276 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:34:01,276 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:01,310 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:01,311 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:34:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:01,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:34:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:01,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:34:01,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:34:01,415 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:34:01,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:34:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:34:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:34:01,416 INFO L87 Difference]: Start difference. First operand 4163 states and 29269 transitions. Second operand 12 states. [2018-12-24 14:34:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:34:05,894 INFO L93 Difference]: Finished difference Result 4232 states and 29577 transitions. [2018-12-24 14:34:05,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:34:05,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:34:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:34:05,909 INFO L225 Difference]: With dead ends: 4232 [2018-12-24 14:34:05,909 INFO L226 Difference]: Without dead ends: 4231 [2018-12-24 14:34:05,911 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:34:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2018-12-24 14:34:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 4190. [2018-12-24 14:34:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2018-12-24 14:34:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 29458 transitions. [2018-12-24 14:34:10,156 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 29458 transitions. Word has length 7 [2018-12-24 14:34:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:34:10,156 INFO L480 AbstractCegarLoop]: Abstraction has 4190 states and 29458 transitions. [2018-12-24 14:34:10,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:34:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 29458 transitions. [2018-12-24 14:34:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:34:10,163 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:34:10,163 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:34:10,163 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:34:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2030548264, now seen corresponding path program 1 times [2018-12-24 14:34:10,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:34:10,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:10,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:10,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:10,164 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:34:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:34:10,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:10,234 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:34:10,235 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:34:10,235 INFO L207 CegarAbsIntRunner]: [0], [6], [18], [24], [28], [30], [31] [2018-12-24 14:34:10,236 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:34:10,236 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:34:10,582 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:34:10,582 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:34:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:10,583 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:34:10,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:10,583 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:34:10,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:10,592 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:34:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:10,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:34:10,600 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 63 treesize of output 56 [2018-12-24 14:34:10,626 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,630 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 53 treesize of output 63 [2018-12-24 14:34:10,682 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,683 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,692 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,692 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 46 treesize of output 68 [2018-12-24 14:34:10,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,748 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,749 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 37 treesize of output 76 [2018-12-24 14:34:10,813 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,815 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:10,827 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:34:10,827 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:10,855 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:10,882 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:10,911 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:10,943 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:10,979 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:34:10,983 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:34:10,987 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:34:10,991 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:34:11,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:34:11,069 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:34:11,070 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,101 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,119 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,133 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,145 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,157 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,199 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:11,199 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:34:11,234 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,234 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:34:11,235 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,275 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:11,275 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:34:11,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,308 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,309 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,315 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:34:11,326 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:34:11,469 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:34:11,469 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:98 [2018-12-24 14:34:11,534 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,535 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,540 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,542 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:11,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:11,544 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 97 [2018-12-24 14:34:11,544 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:11,577 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:11,578 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:50, output treesize:34 [2018-12-24 14:34:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:11,605 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:34:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:11,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:34:11,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:34:11,657 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:34:11,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:34:11,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:34:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:34:11,657 INFO L87 Difference]: Start difference. First operand 4190 states and 29458 transitions. Second operand 10 states. [2018-12-24 14:34:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:34:16,357 INFO L93 Difference]: Finished difference Result 4570 states and 31903 transitions. [2018-12-24 14:34:16,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:34:16,357 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:34:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:34:16,373 INFO L225 Difference]: With dead ends: 4570 [2018-12-24 14:34:16,373 INFO L226 Difference]: Without dead ends: 4569 [2018-12-24 14:34:16,375 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:34:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2018-12-24 14:34:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4419. [2018-12-24 14:34:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4419 states. [2018-12-24 14:34:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 31072 transitions. [2018-12-24 14:34:20,981 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 31072 transitions. Word has length 7 [2018-12-24 14:34:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:34:20,982 INFO L480 AbstractCegarLoop]: Abstraction has 4419 states and 31072 transitions. [2018-12-24 14:34:20,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:34:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 31072 transitions. [2018-12-24 14:34:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:34:20,989 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:34:20,989 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:34:20,989 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:34:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:20,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2030561782, now seen corresponding path program 1 times [2018-12-24 14:34:20,989 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:34:20,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:20,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:20,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:20,990 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:34:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:21,238 WARN L181 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 19 [2018-12-24 14:34:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:34:21,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:21,356 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:34:21,356 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:34:21,356 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [18], [24], [28], [29] [2018-12-24 14:34:21,357 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:34:21,357 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:34:21,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:34:21,782 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:34:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:21,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:34:21,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:21,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:34:21,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:21,791 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:34:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:21,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:34:21,835 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 21 treesize of output 24 [2018-12-24 14:34:21,837 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:34:21,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,844 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,845 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 26 treesize of output 40 [2018-12-24 14:34:21,848 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,851 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 28 treesize of output 54 [2018-12-24 14:34:21,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,858 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 30 treesize of output 72 [2018-12-24 14:34:21,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:21,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:34:21,868 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:21,909 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:21,931 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:21,949 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:21,963 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:21,976 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,010 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:34:22,142 WARN L181 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-12-24 14:34:22,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,148 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:34:22,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,200 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:34:22,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,249 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,250 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,254 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:34:22,396 WARN L181 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-12-24 14:34:22,400 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,401 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,408 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:34:22,408 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,433 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,458 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,482 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,507 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,551 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:22,551 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:34:22,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,594 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:34:22,595 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,635 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:22,635 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:34:22,670 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,671 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,673 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,674 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,675 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,676 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,677 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,677 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:34:22,678 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,725 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:22,725 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:34:22,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,758 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,759 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,760 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,761 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,762 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,764 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,765 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,768 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:22,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,770 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:34:22,770 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,819 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:22,820 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:47 [2018-12-24 14:34:22,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,857 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,868 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:22,871 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:22,871 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 131 [2018-12-24 14:34:22,872 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:22,922 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. [2018-12-24 14:34:22,922 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:61, output treesize:47 [2018-12-24 14:34:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:22,951 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:34:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:23,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:34:23,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2018-12-24 14:34:23,051 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:34:23,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:34:23,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:34:23,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:34:23,052 INFO L87 Difference]: Start difference. First operand 4419 states and 31072 transitions. Second operand 12 states. [2018-12-24 14:34:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:34:29,643 INFO L93 Difference]: Finished difference Result 5928 states and 41521 transitions. [2018-12-24 14:34:29,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:34:29,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:34:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:34:29,664 INFO L225 Difference]: With dead ends: 5928 [2018-12-24 14:34:29,664 INFO L226 Difference]: Without dead ends: 5927 [2018-12-24 14:34:29,666 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:34:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2018-12-24 14:34:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5628. [2018-12-24 14:34:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5628 states. [2018-12-24 14:34:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 39710 transitions. [2018-12-24 14:34:35,746 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 39710 transitions. Word has length 7 [2018-12-24 14:34:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:34:35,746 INFO L480 AbstractCegarLoop]: Abstraction has 5628 states and 39710 transitions. [2018-12-24 14:34:35,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:34:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 39710 transitions. [2018-12-24 14:34:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:34:35,753 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:34:35,753 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:34:35,753 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:34:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2030965338, now seen corresponding path program 1 times [2018-12-24 14:34:35,754 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:34:35,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:35,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:35,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:35,755 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:34:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:34:35,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:35,889 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:34:35,889 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:34:35,889 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [28], [30], [31] [2018-12-24 14:34:35,890 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:34:35,890 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:34:36,187 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:34:36,187 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:34:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:36,187 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:34:36,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:36,188 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:34:36,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:36,197 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:34:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:36,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:34:36,206 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 21 treesize of output 24 [2018-12-24 14:34:36,208 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 24 treesize of output 26 [2018-12-24 14:34:36,218 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,220 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,221 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 26 treesize of output 36 [2018-12-24 14:34:36,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,231 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,233 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,233 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:34:36,236 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,239 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,242 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 30 treesize of output 68 [2018-12-24 14:34:36,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:34:36,257 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,290 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,310 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,326 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,338 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,351 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,374 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:34:36,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,390 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 36 treesize of output 49 [2018-12-24 14:34:36,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,426 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 32 treesize of output 57 [2018-12-24 14:34:36,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,464 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,465 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,466 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,468 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:34:36,469 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,483 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,497 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,512 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,541 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:36,542 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2018-12-24 14:34:36,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,591 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 62 [2018-12-24 14:34:36,591 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,615 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:36,615 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2018-12-24 14:34:36,641 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,642 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,643 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,646 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,648 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,657 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 88 [2018-12-24 14:34:36,658 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:34:36,750 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:34:36,751 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:68 [2018-12-24 14:34:36,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,795 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,796 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,797 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,799 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,800 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:36,800 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 101 [2018-12-24 14:34:36,801 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,863 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,864 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:36,867 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:36,868 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 73 [2018-12-24 14:34:36,868 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:36,909 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 2 xjuncts. [2018-12-24 14:34:36,910 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:88, output treesize:70 [2018-12-24 14:34:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:36,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:34:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:37,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:34:37,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2018-12-24 14:34:37,021 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:34:37,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:34:37,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:34:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:34:37,022 INFO L87 Difference]: Start difference. First operand 5628 states and 39710 transitions. Second operand 11 states. [2018-12-24 14:34:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:34:44,634 INFO L93 Difference]: Finished difference Result 6511 states and 45570 transitions. [2018-12-24 14:34:44,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:34:44,634 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:34:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:34:44,655 INFO L225 Difference]: With dead ends: 6511 [2018-12-24 14:34:44,655 INFO L226 Difference]: Without dead ends: 6510 [2018-12-24 14:34:44,657 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:34:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6510 states. [2018-12-24 14:34:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6510 to 6405. [2018-12-24 14:34:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6405 states. [2018-12-24 14:34:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6405 states to 6405 states and 45149 transitions. [2018-12-24 14:34:52,239 INFO L78 Accepts]: Start accepts. Automaton has 6405 states and 45149 transitions. Word has length 7 [2018-12-24 14:34:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:34:52,239 INFO L480 AbstractCegarLoop]: Abstraction has 6405 states and 45149 transitions. [2018-12-24 14:34:52,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:34:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 6405 states and 45149 transitions. [2018-12-24 14:34:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:34:52,247 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:34:52,247 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:34:52,247 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:34:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2015785446, now seen corresponding path program 1 times [2018-12-24 14:34:52,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:34:52,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:52,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:52,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:34:52,248 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:34:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:52,784 WARN L181 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2018-12-24 14:34:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:52,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:52,970 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:34:52,970 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:34:52,970 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [22], [24], [28], [29] [2018-12-24 14:34:52,971 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:34:52,971 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:34:53,358 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:34:53,358 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:34:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:34:53,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:34:53,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:34:53,359 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:34:53,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:34:53,369 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:34:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:34:53,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:34:53,379 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 63 treesize of output 56 [2018-12-24 14:34:53,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,410 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,410 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 53 treesize of output 63 [2018-12-24 14:34:53,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,452 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,456 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 46 treesize of output 68 [2018-12-24 14:34:53,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,502 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,503 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,504 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:34:53,564 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,565 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,566 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,567 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,568 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,569 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,570 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,572 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,573 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:34:53,574 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,597 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,621 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,645 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,672 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,704 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:34:53,709 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:34:53,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:34:53,717 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:34:53,721 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:34:53,725 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:34:53,726 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,757 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,775 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,789 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,801 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,812 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,853 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:53,854 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:84, output treesize:87 [2018-12-24 14:34:53,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,924 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 66 [2018-12-24 14:34:53,925 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:53,952 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:53,952 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:50 [2018-12-24 14:34:53,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,988 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,989 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,990 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,991 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,992 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:53,993 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 80 [2018-12-24 14:34:53,994 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:54,023 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:54,024 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:40 [2018-12-24 14:34:54,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,055 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,058 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,059 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,060 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,061 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,063 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:54,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,064 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 93 [2018-12-24 14:34:54,065 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:54,098 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:54,098 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:34 [2018-12-24 14:34:54,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,136 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:34:54,140 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:34:54,141 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 100 [2018-12-24 14:34:54,142 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:34:54,176 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:34:54,176 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:38 [2018-12-24 14:34:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:54,475 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:34:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:34:54,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:34:54,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2018-12-24 14:34:54,564 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:34:54,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:34:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:34:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:34:54,565 INFO L87 Difference]: Start difference. First operand 6405 states and 45149 transitions. Second operand 13 states. [2018-12-24 14:35:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:35:04,174 INFO L93 Difference]: Finished difference Result 7179 states and 50083 transitions. [2018-12-24 14:35:04,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-24 14:35:04,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:35:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:35:04,201 INFO L225 Difference]: With dead ends: 7179 [2018-12-24 14:35:04,202 INFO L226 Difference]: Without dead ends: 7170 [2018-12-24 14:35:04,204 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2018-12-24 14:35:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2018-12-24 14:35:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 6542. [2018-12-24 14:35:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6542 states. [2018-12-24 14:35:11,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6542 states to 6542 states and 46140 transitions. [2018-12-24 14:35:11,848 INFO L78 Accepts]: Start accepts. Automaton has 6542 states and 46140 transitions. Word has length 7 [2018-12-24 14:35:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:35:11,849 INFO L480 AbstractCegarLoop]: Abstraction has 6542 states and 46140 transitions. [2018-12-24 14:35:11,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:35:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 6542 states and 46140 transitions. [2018-12-24 14:35:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:35:11,857 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:35:11,857 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:35:11,857 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:35:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:35:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2015650778, now seen corresponding path program 1 times [2018-12-24 14:35:11,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:35:11,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:35:11,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:35:11,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:35:11,858 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:35:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:35:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:35:11,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:35:11,907 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:35:11,907 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:35:11,907 INFO L207 CegarAbsIntRunner]: [0], [18], [22], [28], [30], [32], [33] [2018-12-24 14:35:11,909 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:35:11,909 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:35:12,127 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:35:12,127 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:35:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:35:12,127 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:35:12,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:35:12,128 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:35:12,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:35:12,136 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:35:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:35:12,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:35:12,149 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2018-12-24 14:35:12,152 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2018-12-24 14:35:12,163 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2018-12-24 14:35:12,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,191 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,212 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 56 [2018-12-24 14:35:12,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,257 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,258 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,260 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,262 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,264 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,266 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 37 [2018-12-24 14:35:12,266 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,282 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,298 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,315 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,331 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,352 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:35:12,355 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:35:12,360 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2018-12-24 14:35:12,371 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2018-12-24 14:35:12,378 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 30 treesize of output 48 [2018-12-24 14:35:12,387 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:35:12,387 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,410 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,422 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,433 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,444 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,456 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,485 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. [2018-12-24 14:35:12,485 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:59, output treesize:67 [2018-12-24 14:35:12,515 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,536 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 79 [2018-12-24 14:35:12,538 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 8 xjuncts. [2018-12-24 14:35:12,804 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 20 dim-0 vars, and 8 xjuncts. [2018-12-24 14:35:12,804 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:77, output treesize:333 [2018-12-24 14:35:12,865 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:12,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 42 [2018-12-24 14:35:12,869 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:12,882 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:35:12,883 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:18 [2018-12-24 14:35:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:35:12,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:35:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:35:12,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:35:12,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2018-12-24 14:35:12,926 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:35:12,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:35:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:35:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:35:12,927 INFO L87 Difference]: Start difference. First operand 6542 states and 46140 transitions. Second operand 8 states. [2018-12-24 14:35:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:35:23,742 INFO L93 Difference]: Finished difference Result 10441 states and 73753 transitions. [2018-12-24 14:35:23,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:35:23,743 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:35:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:35:23,778 INFO L225 Difference]: With dead ends: 10441 [2018-12-24 14:35:23,778 INFO L226 Difference]: Without dead ends: 10440 [2018-12-24 14:35:23,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:35:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10440 states. [2018-12-24 14:35:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10440 to 10397. [2018-12-24 14:35:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10397 states. [2018-12-24 14:35:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10397 states to 10397 states and 73709 transitions. [2018-12-24 14:35:35,013 INFO L78 Accepts]: Start accepts. Automaton has 10397 states and 73709 transitions. Word has length 7 [2018-12-24 14:35:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:35:35,013 INFO L480 AbstractCegarLoop]: Abstraction has 10397 states and 73709 transitions. [2018-12-24 14:35:35,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:35:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10397 states and 73709 transitions. [2018-12-24 14:35:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:35:35,023 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:35:35,023 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:35:35,023 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:35:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:35:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2014341960, now seen corresponding path program 1 times [2018-12-24 14:35:35,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:35:35,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:35:35,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:35:35,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:35:35,024 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:35:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:35:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:35:35,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:35:35,127 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:35:35,127 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:35:35,127 INFO L207 CegarAbsIntRunner]: [0], [10], [18], [24], [28], [30], [31] [2018-12-24 14:35:35,128 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:35:35,128 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:35:35,433 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:35:35,433 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:35:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:35:35,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:35:35,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:35:35,433 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:35:35,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:35:35,442 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:35:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:35:35,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:35:35,451 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 21 treesize of output 24 [2018-12-24 14:35:35,455 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:35:35,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,463 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 26 treesize of output 36 [2018-12-24 14:35:35,470 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,472 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,474 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,475 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 28 treesize of output 50 [2018-12-24 14:35:35,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,488 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:35:35,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,501 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,506 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,506 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:35:35,507 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,545 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,565 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,581 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,594 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,607 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,634 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2018-12-24 14:35:35,649 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,651 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,652 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:35:35,686 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,688 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,690 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,691 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,691 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 46 treesize of output 68 [2018-12-24 14:35:35,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,737 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,743 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 37 treesize of output 76 [2018-12-24 14:35:35,798 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,800 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,801 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,802 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,803 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,804 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,805 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,807 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:35:35,808 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,831 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,854 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,877 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,902 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:35:35,943 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:35:35,944 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:35:35,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:35,975 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:35:35,975 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:36,015 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:35:36,015 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2018-12-24 14:35:36,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,043 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,044 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,045 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,046 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,048 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,048 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:35:36,049 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 102 [2018-12-24 14:35:36,049 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:35:36,090 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:35:36,090 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:55 [2018-12-24 14:35:36,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,126 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:35:36,126 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:35:36,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 108 [2018-12-24 14:35:36,136 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:35:36,272 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:35:36,272 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:69, output treesize:102 [2018-12-24 14:35:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:35:38,329 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:35:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:35:38,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:35:38,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:35:38,386 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:35:38,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:35:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:35:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=114, Unknown=1, NotChecked=0, Total=182 [2018-12-24 14:35:38,387 INFO L87 Difference]: Start difference. First operand 10397 states and 73709 transitions. Second operand 10 states. [2018-12-24 14:35:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:35:49,593 INFO L93 Difference]: Finished difference Result 10427 states and 73743 transitions. [2018-12-24 14:35:49,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-24 14:35:49,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:35:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:35:49,634 INFO L225 Difference]: With dead ends: 10427 [2018-12-24 14:35:49,634 INFO L226 Difference]: Without dead ends: 10426 [2018-12-24 14:35:49,638 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=100, Invalid=171, Unknown=1, NotChecked=0, Total=272 [2018-12-24 14:35:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10426 states. [2018-12-24 14:36:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10426 to 10394. [2018-12-24 14:36:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10394 states. [2018-12-24 14:36:01,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10394 states to 10394 states and 73688 transitions. [2018-12-24 14:36:01,191 INFO L78 Accepts]: Start accepts. Automaton has 10394 states and 73688 transitions. Word has length 7 [2018-12-24 14:36:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:36:01,191 INFO L480 AbstractCegarLoop]: Abstraction has 10394 states and 73688 transitions. [2018-12-24 14:36:01,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:36:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 10394 states and 73688 transitions. [2018-12-24 14:36:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:36:01,201 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:36:01,201 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:36:01,202 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:36:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:36:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2026927280, now seen corresponding path program 1 times [2018-12-24 14:36:01,202 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:36:01,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:36:01,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:36:01,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:36:01,203 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:36:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:36:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:36:01,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:36:01,324 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:36:01,325 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:36:01,325 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [28], [29] [2018-12-24 14:36:01,325 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:36:01,325 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:36:01,679 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:36:01,679 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:36:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:36:01,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:36:01,680 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:36:01,680 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:36:01,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:36:01,690 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:36:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:36:01,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:36:01,700 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 21 treesize of output 24 [2018-12-24 14:36:01,704 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 24 treesize of output 26 [2018-12-24 14:36:01,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,713 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,713 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:36:01,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,727 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:36:01,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,742 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 30 treesize of output 68 [2018-12-24 14:36:01,755 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:36:01,755 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,783 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,803 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,818 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,831 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,843 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,865 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 43 treesize of output 39 [2018-12-24 14:36:01,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,881 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:36:01,912 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,917 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 32 treesize of output 57 [2018-12-24 14:36:01,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:01,961 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:36:01,962 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,976 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:01,988 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:02,004 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:02,033 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:02,033 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:64, output treesize:67 [2018-12-24 14:36:02,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,081 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2018-12-24 14:36:02,081 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:02,097 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:02,097 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:33 [2018-12-24 14:36:02,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,123 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,124 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:36:02,125 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 60 [2018-12-24 14:36:02,125 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:02,145 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:02,145 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:29 [2018-12-24 14:36:02,165 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,167 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,168 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,170 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,171 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,172 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,173 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 61 [2018-12-24 14:36:02,173 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:02,192 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:02,192 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:29 [2018-12-24 14:36:02,219 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,221 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,222 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,223 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,224 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,225 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,226 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:02,229 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:36:02,229 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 75 [2018-12-24 14:36:02,230 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:02,250 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:02,251 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:33 [2018-12-24 14:36:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:36:02,272 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:36:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:36:02,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:36:02,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:36:02,346 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:36:02,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:36:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:36:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:36:02,347 INFO L87 Difference]: Start difference. First operand 10394 states and 73688 transitions. Second operand 12 states. [2018-12-24 14:36:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:36:14,376 INFO L93 Difference]: Finished difference Result 11408 states and 80747 transitions. [2018-12-24 14:36:14,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:36:14,376 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:36:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:36:14,425 INFO L225 Difference]: With dead ends: 11408 [2018-12-24 14:36:14,425 INFO L226 Difference]: Without dead ends: 11406 [2018-12-24 14:36:14,429 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:36:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11406 states. [2018-12-24 14:36:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11406 to 11270. [2018-12-24 14:36:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2018-12-24 14:36:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 80138 transitions. [2018-12-24 14:36:27,376 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 80138 transitions. Word has length 7 [2018-12-24 14:36:27,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:36:27,376 INFO L480 AbstractCegarLoop]: Abstraction has 11270 states and 80138 transitions. [2018-12-24 14:36:27,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:36:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 80138 transitions. [2018-12-24 14:36:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:36:27,387 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:36:27,387 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:36:27,387 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:36:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:36:27,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2023700554, now seen corresponding path program 2 times [2018-12-24 14:36:27,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:36:27,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:36:27,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:36:27,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:36:27,388 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:36:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:36:27,569 WARN L181 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2018-12-24 14:36:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:36:27,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:36:27,651 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:36:27,651 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:36:27,651 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:36:27,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:36:27,652 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:36:27,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:36:27,663 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:36:27,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-24 14:36:27,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:36:27,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:36:27,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:36:27,709 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 24 treesize of output 30 [2018-12-24 14:36:27,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,766 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,766 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 26 treesize of output 40 [2018-12-24 14:36:27,807 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,846 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:36:27,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,905 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,949 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 30 treesize of output 72 [2018-12-24 14:36:27,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:27,999 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,021 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:36:28,021 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,060 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,082 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,100 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,114 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,128 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,159 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:36:28,197 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,198 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:36:28,240 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,241 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,242 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,243 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,244 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:36:28,293 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,294 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,295 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,296 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,299 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:36:28,360 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,362 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,363 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,364 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,365 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,366 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,367 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,368 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,369 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:36:28,369 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,394 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,419 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,444 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,469 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,513 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:28,513 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:36:28,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 91 [2018-12-24 14:36:28,551 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,592 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:28,593 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:36:28,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,687 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,702 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,704 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,705 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,707 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 113 [2018-12-24 14:36:28,708 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,752 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:28,753 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:57 [2018-12-24 14:36:28,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,778 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,779 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,781 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,787 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,791 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:36:28,792 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 129 [2018-12-24 14:36:28,792 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,843 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:28,843 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:49 [2018-12-24 14:36:28,867 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,872 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,874 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,877 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,878 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,882 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:36:28,883 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,883 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 122 [2018-12-24 14:36:28,884 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:28,930 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:36:28,930 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:43 [2018-12-24 14:36:28,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,965 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,976 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,977 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:28,978 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 125 [2018-12-24 14:36:28,978 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:29,029 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. [2018-12-24 14:36:29,029 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:41 [2018-12-24 14:36:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:36:29,060 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:36:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:36:29,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:36:29,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2018-12-24 14:36:29,156 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:36:29,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:36:29,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:36:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2018-12-24 14:36:29,156 INFO L87 Difference]: Start difference. First operand 11270 states and 80138 transitions. Second operand 13 states. [2018-12-24 14:36:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:36:45,116 INFO L93 Difference]: Finished difference Result 14692 states and 103813 transitions. [2018-12-24 14:36:45,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-24 14:36:45,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:36:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:36:45,167 INFO L225 Difference]: With dead ends: 14692 [2018-12-24 14:36:45,167 INFO L226 Difference]: Without dead ends: 14688 [2018-12-24 14:36:45,171 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:36:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14688 states. [2018-12-24 14:36:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14688 to 12758. [2018-12-24 14:36:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12758 states. [2018-12-24 14:36:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12758 states to 12758 states and 90546 transitions. [2018-12-24 14:36:59,239 INFO L78 Accepts]: Start accepts. Automaton has 12758 states and 90546 transitions. Word has length 7 [2018-12-24 14:36:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:36:59,239 INFO L480 AbstractCegarLoop]: Abstraction has 12758 states and 90546 transitions. [2018-12-24 14:36:59,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:36:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 12758 states and 90546 transitions. [2018-12-24 14:36:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:36:59,250 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:36:59,250 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:36:59,250 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:36:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:36:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2023160096, now seen corresponding path program 1 times [2018-12-24 14:36:59,251 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:36:59,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:36:59,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:36:59,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:36:59,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:36:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:36:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:36:59,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:36:59,307 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:36:59,307 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:36:59,308 INFO L207 CegarAbsIntRunner]: [0], [14], [18], [24], [28], [30], [31] [2018-12-24 14:36:59,308 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:36:59,309 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:36:59,614 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:36:59,614 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:36:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:36:59,614 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:36:59,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:36:59,614 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:36:59,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:36:59,810 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:36:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:36:59,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:36:59,838 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 21 treesize of output 24 [2018-12-24 14:36:59,847 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:36:59,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,854 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 26 treesize of output 36 [2018-12-24 14:36:59,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,862 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,862 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 28 treesize of output 50 [2018-12-24 14:36:59,866 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,869 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,870 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,871 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,872 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 30 treesize of output 68 [2018-12-24 14:36:59,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,876 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,879 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,880 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,881 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:36:59,881 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:36:59,882 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:36:59,919 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:59,940 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:59,956 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:59,969 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:36:59,982 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,009 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 63 treesize of output 56 [2018-12-24 14:37:00,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,026 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,027 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 63 [2018-12-24 14:37:00,062 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,067 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 46 treesize of output 68 [2018-12-24 14:37:00,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,118 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 37 treesize of output 76 [2018-12-24 14:37:00,175 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,176 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,177 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,178 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,179 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,180 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,181 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,183 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,184 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:37:00,184 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,208 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,231 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,254 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,279 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,320 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:37:00,320 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:37:00,350 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,351 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 87 [2018-12-24 14:37:00,352 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,390 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:37:00,390 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:67 [2018-12-24 14:37:00,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,425 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 109 [2018-12-24 14:37:00,426 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,468 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:37:00,468 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:79, output treesize:53 [2018-12-24 14:37:00,516 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,518 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,519 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,520 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,521 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,522 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,527 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,528 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,529 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:37:00,530 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:00,530 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:37:00,531 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:00,576 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. [2018-12-24 14:37:00,576 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:43 [2018-12-24 14:37:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:37:00,597 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:37:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:37:00,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:37:00,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2018-12-24 14:37:00,649 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:37:00,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:37:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:37:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:37:00,649 INFO L87 Difference]: Start difference. First operand 12758 states and 90546 transitions. Second operand 10 states. [2018-12-24 14:37:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:37:14,420 INFO L93 Difference]: Finished difference Result 13016 states and 92075 transitions. [2018-12-24 14:37:14,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:37:14,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:37:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:37:14,468 INFO L225 Difference]: With dead ends: 13016 [2018-12-24 14:37:14,468 INFO L226 Difference]: Without dead ends: 13015 [2018-12-24 14:37:14,471 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:37:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13015 states. [2018-12-24 14:37:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13015 to 12958. [2018-12-24 14:37:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2018-12-24 14:37:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2018-12-24 14:37:28,849 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2018-12-24 14:37:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:37:28,849 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2018-12-24 14:37:28,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:37:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2018-12-24 14:37:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:37:28,862 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:37:28,862 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:37:28,862 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:37:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:37:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1920990370, now seen corresponding path program 1 times [2018-12-24 14:37:28,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:37:28,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:37:28,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:37:28,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:37:28,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:37:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:37:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:37:28,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:37:28,921 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:37:28,921 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:37:28,921 INFO L207 CegarAbsIntRunner]: [0], [6], [28], [30], [32], [33] [2018-12-24 14:37:28,922 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:37:28,922 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:37:29,071 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:37:29,071 INFO L272 AbstractInterpreter]: Visited 6 different actions 8 times. Merged at 1 different actions 1 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 0 variables. [2018-12-24 14:37:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:37:29,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:37:29,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:37:29,072 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:37:29,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:37:29,082 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:37:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:37:29,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:37:29,091 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 21 treesize of output 24 [2018-12-24 14:37:29,095 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:37:29,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,104 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,104 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 26 treesize of output 36 [2018-12-24 14:37:29,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:37:29,124 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,132 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 30 treesize of output 68 [2018-12-24 14:37:29,142 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:37:29,143 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,167 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,187 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,203 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,216 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,228 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,251 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2018-12-24 14:37:29,265 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,267 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,267 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 49 [2018-12-24 14:37:29,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,299 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,301 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,302 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,303 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 32 treesize of output 57 [2018-12-24 14:37:29,341 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,342 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,343 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,344 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,345 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,347 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,347 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:37:29,348 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,362 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,376 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,391 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,420 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. [2018-12-24 14:37:29,420 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:64, output treesize:67 [2018-12-24 14:37:29,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,462 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:37:29,463 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:37:29,558 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:37:29,558 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2018-12-24 14:37:29,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,599 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:29,599 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:37:29,600 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:29,620 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:37:29,620 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:33 [2018-12-24 14:37:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:37:29,637 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:37:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:37:29,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:37:29,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 8 [2018-12-24 14:37:29,672 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:37:29,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-24 14:37:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-24 14:37:29,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2018-12-24 14:37:29,673 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 7 states. [2018-12-24 14:37:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:37:43,503 INFO L93 Difference]: Finished difference Result 12974 states and 91967 transitions. [2018-12-24 14:37:43,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:37:43,504 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-12-24 14:37:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:37:43,550 INFO L225 Difference]: With dead ends: 12974 [2018-12-24 14:37:43,550 INFO L226 Difference]: Without dead ends: 12973 [2018-12-24 14:37:43,553 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:37:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12973 states. [2018-12-24 14:37:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12973 to 12958. [2018-12-24 14:37:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12958 states. [2018-12-24 14:37:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12958 states to 12958 states and 91946 transitions. [2018-12-24 14:37:59,198 INFO L78 Accepts]: Start accepts. Automaton has 12958 states and 91946 transitions. Word has length 7 [2018-12-24 14:37:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:37:59,198 INFO L480 AbstractCegarLoop]: Abstraction has 12958 states and 91946 transitions. [2018-12-24 14:37:59,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-24 14:37:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12958 states and 91946 transitions. [2018-12-24 14:37:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:37:59,209 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:37:59,209 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:37:59,209 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:37:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:37:59,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1935645556, now seen corresponding path program 1 times [2018-12-24 14:37:59,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:37:59,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:37:59,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:37:59,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:37:59,210 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:37:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:37:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:37:59,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:37:59,280 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:37:59,280 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:37:59,280 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [24], [28], [30], [31] [2018-12-24 14:37:59,281 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:37:59,281 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:37:59,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:37:59,782 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:37:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:37:59,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:37:59,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:37:59,783 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:37:59,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:37:59,790 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:37:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:37:59,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:37:59,798 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 21 treesize of output 24 [2018-12-24 14:37:59,802 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 24 treesize of output 26 [2018-12-24 14:37:59,808 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,810 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,811 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 26 treesize of output 36 [2018-12-24 14:37:59,816 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,820 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 28 treesize of output 50 [2018-12-24 14:37:59,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,828 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 30 treesize of output 68 [2018-12-24 14:37:59,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,840 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,841 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,842 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,842 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:37:59,842 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:37:59,879 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:59,900 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:59,916 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:59,929 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:59,942 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:37:59,968 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 63 treesize of output 56 [2018-12-24 14:37:59,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:37:59,988 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 53 treesize of output 63 [2018-12-24 14:38:00,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,028 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:38:00,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,076 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,080 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 37 treesize of output 76 [2018-12-24 14:38:00,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,144 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:38:00,145 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,168 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,191 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,214 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,240 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:00,281 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:38:00,316 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:38:00,326 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:38:00,466 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:38:00,466 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2018-12-24 14:38:00,525 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,526 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,526 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:38:00,526 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:38:00,527 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,562 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:00,562 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2018-12-24 14:38:00,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,592 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,593 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,594 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:00,595 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 78 [2018-12-24 14:38:00,596 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:00,628 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:00,628 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2018-12-24 14:38:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:38:00,650 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:38:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:38:00,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:38:00,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:38:00,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:38:00,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:38:00,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:38:00,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:38:00,721 INFO L87 Difference]: Start difference. First operand 12958 states and 91946 transitions. Second operand 10 states. [2018-12-24 14:38:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:38:14,800 INFO L93 Difference]: Finished difference Result 13106 states and 92752 transitions. [2018-12-24 14:38:14,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:38:14,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:38:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:38:14,849 INFO L225 Difference]: With dead ends: 13106 [2018-12-24 14:38:14,849 INFO L226 Difference]: Without dead ends: 13105 [2018-12-24 14:38:14,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2018-12-24 14:38:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13105 states. [2018-12-24 14:38:29,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13105 to 13023. [2018-12-24 14:38:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13023 states. [2018-12-24 14:38:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13023 states to 13023 states and 92401 transitions. [2018-12-24 14:38:29,222 INFO L78 Accepts]: Start accepts. Automaton has 13023 states and 92401 transitions. Word has length 7 [2018-12-24 14:38:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:38:29,222 INFO L480 AbstractCegarLoop]: Abstraction has 13023 states and 92401 transitions. [2018-12-24 14:38:29,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:38:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 13023 states and 92401 transitions. [2018-12-24 14:38:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:38:29,233 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:38:29,233 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:38:29,233 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:38:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:38:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1935632038, now seen corresponding path program 1 times [2018-12-24 14:38:29,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:38:29,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:38:29,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:38:29,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:38:29,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:38:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:38:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:38:29,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:38:29,359 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:38:29,359 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:38:29,359 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [22], [24], [28], [29] [2018-12-24 14:38:29,360 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:38:29,360 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:38:29,725 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:38:29,725 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:38:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:38:29,725 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:38:29,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:38:29,726 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:38:29,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:38:29,734 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:38:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:38:29,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:38:29,762 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 21 treesize of output 24 [2018-12-24 14:38:29,765 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:38:29,768 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,769 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,770 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 26 treesize of output 40 [2018-12-24 14:38:29,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,776 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,776 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 28 treesize of output 54 [2018-12-24 14:38:29,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,783 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,786 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,786 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 30 treesize of output 72 [2018-12-24 14:38:29,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,790 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,794 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,794 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:38:29,795 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:29,833 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:29,854 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:29,872 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:29,884 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:29,896 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:29,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,928 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:38:29,966 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,967 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:29,968 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:38:30,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,013 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:38:30,063 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,064 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,065 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,066 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,067 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,068 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,069 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:38:30,127 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,129 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,130 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,132 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,133 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,134 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,135 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,135 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:38:30,136 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,161 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,185 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,210 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,235 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,278 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:30,279 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:38:30,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,320 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:38:30,321 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,364 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:30,365 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:38:30,402 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,403 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,404 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,405 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,406 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,407 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,409 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:38:30,410 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:38:30,410 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,454 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:30,455 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:59 [2018-12-24 14:38:30,488 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,489 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,490 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,491 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,492 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,493 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,494 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,495 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,496 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,497 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,499 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:38:30,499 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,545 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:38:30,545 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:47 [2018-12-24 14:38:30,576 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,577 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,578 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,579 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,580 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,581 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,582 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,583 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,584 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,590 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:38:30,591 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:38:30,591 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:38:30,592 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:38:30,639 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. [2018-12-24 14:38:30,640 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2018-12-24 14:38:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:38:30,673 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:38:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:38:30,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:38:30,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2018-12-24 14:38:30,752 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:38:30,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-24 14:38:30,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-24 14:38:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:38:30,753 INFO L87 Difference]: Start difference. First operand 13023 states and 92401 transitions. Second operand 12 states. [2018-12-24 14:38:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:38:45,160 INFO L93 Difference]: Finished difference Result 13278 states and 93926 transitions. [2018-12-24 14:38:45,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-24 14:38:45,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 7 [2018-12-24 14:38:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:38:45,210 INFO L225 Difference]: With dead ends: 13278 [2018-12-24 14:38:45,210 INFO L226 Difference]: Without dead ends: 13277 [2018-12-24 14:38:45,213 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:38:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13277 states. [2018-12-24 14:38:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13277 to 13233. [2018-12-24 14:38:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13233 states. [2018-12-24 14:38:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13233 states to 13233 states and 93871 transitions. [2018-12-24 14:38:59,793 INFO L78 Accepts]: Start accepts. Automaton has 13233 states and 93871 transitions. Word has length 7 [2018-12-24 14:38:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:38:59,793 INFO L480 AbstractCegarLoop]: Abstraction has 13233 states and 93871 transitions. [2018-12-24 14:38:59,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-24 14:38:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 13233 states and 93871 transitions. [2018-12-24 14:38:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:38:59,804 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:38:59,804 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:38:59,804 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:38:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:38:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1935214964, now seen corresponding path program 1 times [2018-12-24 14:38:59,804 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:38:59,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:38:59,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:38:59,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:38:59,805 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:38:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:38:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:38:59,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:38:59,953 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:38:59,954 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:38:59,954 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [14], [22], [28], [29] [2018-12-24 14:38:59,954 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:38:59,954 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:39:00,317 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:39:00,318 INFO L272 AbstractInterpreter]: Visited 7 different actions 12 times. Merged at 1 different actions 1 times. Never widened. Found 8 fixpoints after 5 different actions. Largest state had 0 variables. [2018-12-24 14:39:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:39:00,318 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:39:00,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:39:00,318 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:39:00,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:39:00,327 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:39:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:39:00,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:39:00,364 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 21 treesize of output 24 [2018-12-24 14:39:00,367 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:39:00,373 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,374 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,374 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 26 treesize of output 40 [2018-12-24 14:39:00,378 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,380 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,382 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,382 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 28 treesize of output 54 [2018-12-24 14:39:00,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,390 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:39:00,398 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:39:00,399 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,425 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,445 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,463 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,476 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,489 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,517 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,518 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 48 treesize of output 54 [2018-12-24 14:39:00,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,550 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 53 [2018-12-24 14:39:00,585 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,586 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,587 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,588 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,588 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 32 treesize of output 61 [2018-12-24 14:39:00,630 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,631 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,632 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,633 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,634 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,636 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:39:00,636 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,652 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,666 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,682 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,713 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:00,713 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:39:00,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,767 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:39:00,768 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,797 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:00,797 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:76, output treesize:50 [2018-12-24 14:39:00,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,824 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,828 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:00,828 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:39:00,829 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,857 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:00,858 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:42 [2018-12-24 14:39:00,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,887 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,888 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,889 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,890 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,891 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,892 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,893 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,894 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,894 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:39:00,895 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,927 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:00,927 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:34 [2018-12-24 14:39:00,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,959 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,960 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,961 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,962 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,963 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:00,963 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:00,964 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 98 [2018-12-24 14:39:00,965 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:00,997 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:00,998 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:40 [2018-12-24 14:39:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:39:01,025 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:39:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:39:01,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:39:01,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2018-12-24 14:39:01,099 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:39:01,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:39:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:39:01,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:39:01,100 INFO L87 Difference]: Start difference. First operand 13233 states and 93871 transitions. Second operand 13 states. [2018-12-24 14:39:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:39:18,776 INFO L93 Difference]: Finished difference Result 17581 states and 124519 transitions. [2018-12-24 14:39:18,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:39:18,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:39:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:39:18,847 INFO L225 Difference]: With dead ends: 17581 [2018-12-24 14:39:18,847 INFO L226 Difference]: Without dead ends: 17580 [2018-12-24 14:39:18,852 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2018-12-24 14:39:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17580 states. [2018-12-24 14:39:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17580 to 9927. [2018-12-24 14:39:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2018-12-24 14:39:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2018-12-24 14:39:30,366 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2018-12-24 14:39:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:39:30,366 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2018-12-24 14:39:30,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:39:30,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2018-12-24 14:39:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:39:30,374 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:39:30,374 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:39:30,374 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:39:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:39:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1935766706, now seen corresponding path program 1 times [2018-12-24 14:39:30,375 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:39:30,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:39:30,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:39:30,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:39:30,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:39:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:39:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:39:30,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:39:30,442 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:39:30,442 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:39:30,443 INFO L207 CegarAbsIntRunner]: [0], [6], [22], [28], [30], [32], [33] [2018-12-24 14:39:30,443 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:39:30,443 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:39:30,670 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:39:30,671 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:39:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:39:30,671 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:39:30,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:39:30,671 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:39:30,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:39:30,681 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:39:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:39:30,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:39:30,690 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:39:30,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:39:30,701 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,703 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,703 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 26 treesize of output 36 [2018-12-24 14:39:30,714 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,717 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,720 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 28 treesize of output 50 [2018-12-24 14:39:30,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,729 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,729 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 30 treesize of output 68 [2018-12-24 14:39:30,734 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,743 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:39:30,743 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:30,780 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:30,801 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:30,816 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:30,829 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:30,842 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:30,867 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 63 treesize of output 56 [2018-12-24 14:39:30,884 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,886 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,886 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 53 treesize of output 63 [2018-12-24 14:39:30,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,926 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 46 treesize of output 68 [2018-12-24 14:39:30,968 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,970 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,972 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,975 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:30,975 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 37 treesize of output 76 [2018-12-24 14:39:31,033 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,034 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,035 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,037 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,039 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,040 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,041 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,042 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,042 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:39:31,043 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:31,066 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:31,089 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:31,112 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:31,137 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:31,179 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:31,179 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:39:31,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,213 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:39:31,214 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:39:31,351 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:39:31,351 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2018-12-24 14:39:31,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:31,414 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:31,415 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:39:31,415 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:31,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:31,445 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:76, output treesize:42 [2018-12-24 14:39:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:39:31,465 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:39:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:39:31,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:39:31,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:39:31,505 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:39:31,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:39:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:39:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:39:31,505 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 8 states. [2018-12-24 14:39:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:39:42,246 INFO L93 Difference]: Finished difference Result 9947 states and 70395 transitions. [2018-12-24 14:39:42,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:39:42,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:39:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:39:42,281 INFO L225 Difference]: With dead ends: 9947 [2018-12-24 14:39:42,281 INFO L226 Difference]: Without dead ends: 9946 [2018-12-24 14:39:42,284 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:39:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9946 states. [2018-12-24 14:39:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9946 to 9927. [2018-12-24 14:39:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9927 states. [2018-12-24 14:39:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 70376 transitions. [2018-12-24 14:39:53,604 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 70376 transitions. Word has length 7 [2018-12-24 14:39:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:39:53,604 INFO L480 AbstractCegarLoop]: Abstraction has 9927 states and 70376 transitions. [2018-12-24 14:39:53,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:39:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 70376 transitions. [2018-12-24 14:39:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:39:53,613 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:39:53,613 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-12-24 14:39:53,613 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:39:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:39:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1937303618, now seen corresponding path program 3 times [2018-12-24 14:39:53,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:39:53,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:39:53,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:39:53,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:39:53,614 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:39:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:39:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:39:53,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:39:53,681 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:39:53,681 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:39:53,681 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:39:53,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:39:53,681 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:39:53,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-24 14:39:53,691 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-24 14:39:53,696 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-24 14:39:53,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:39:53,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:39:53,718 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 21 treesize of output 24 [2018-12-24 14:39:53,720 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 24 treesize of output 30 [2018-12-24 14:39:53,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,725 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 26 treesize of output 40 [2018-12-24 14:39:53,728 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,730 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,731 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,731 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:39:53,735 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,736 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,738 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,739 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,740 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 30 treesize of output 72 [2018-12-24 14:39:53,749 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2018-12-24 14:39:53,750 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:53,777 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:53,803 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:53,819 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:53,833 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:53,846 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:53,873 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,873 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 54 [2018-12-24 14:39:53,903 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,904 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,905 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 41 treesize of output 53 [2018-12-24 14:39:53,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,941 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 32 treesize of output 61 [2018-12-24 14:39:53,982 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,983 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,984 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,985 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,986 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,987 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:53,988 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 41 [2018-12-24 14:39:53,988 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:54,004 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:54,019 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:54,035 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:39:54,066 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:39:54,066 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:72, output treesize:71 [2018-12-24 14:39:54,169 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,178 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-12-24 14:39:54,179 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:39:54,281 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2018-12-24 14:39:54,281 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:109 [2018-12-24 14:39:54,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,396 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:54,397 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 72 [2018-12-24 14:39:54,397 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:54,467 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,471 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,473 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,476 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,478 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,482 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:54,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 107 [2018-12-24 14:39:54,673 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 16 xjuncts. [2018-12-24 14:39:54,988 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 13 dim-0 vars, and 6 xjuncts. [2018-12-24 14:39:54,989 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:126, output treesize:280 [2018-12-24 14:39:55,130 WARN L181 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 92 [2018-12-24 14:39:55,137 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,138 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,139 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,140 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,141 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,142 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,143 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,144 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,145 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,146 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,146 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:55,147 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 93 [2018-12-24 14:39:55,147 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:55,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,286 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,287 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,288 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,290 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:39:55,290 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:55,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,422 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,423 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,424 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,425 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,426 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,427 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,428 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,429 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:55,430 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 113 [2018-12-24 14:39:55,431 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:55,552 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,552 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 66 [2018-12-24 14:39:55,553 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:55,631 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2018-12-24 14:39:55,632 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:227, output treesize:161 [2018-12-24 14:39:55,706 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,707 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,708 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,709 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,711 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,712 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,712 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 78 [2018-12-24 14:39:55,713 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:55,818 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,819 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,820 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,821 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,822 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,823 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,832 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 98 [2018-12-24 14:39:55,832 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:55,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,945 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,946 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,948 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,949 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,950 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,951 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,952 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,954 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,955 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,956 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,957 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,958 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:55,959 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 108 [2018-12-24 14:39:55,960 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:56,070 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,071 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,072 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,073 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,074 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,075 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,077 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,078 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,079 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,080 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,085 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 100 [2018-12-24 14:39:56,085 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:56,181 INFO L267 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: 12 dim-0 vars, and 4 xjuncts. [2018-12-24 14:39:56,181 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:209, output treesize:153 [2018-12-24 14:39:56,270 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,271 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,272 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,273 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,275 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,276 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,277 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,278 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,279 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,280 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,281 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,282 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,283 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,284 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,285 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,286 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:56,287 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 123 [2018-12-24 14:39:56,287 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:56,408 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,409 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,411 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,412 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,413 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,414 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,415 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,416 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,417 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,418 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,419 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,420 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,421 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,422 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 118 [2018-12-24 14:39:56,422 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:56,536 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,537 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,538 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,539 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,543 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,548 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,552 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:39:56,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 125 [2018-12-24 14:39:56,554 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:56,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,668 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:39:56,669 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 88 [2018-12-24 14:39:56,669 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:39:56,746 INFO L267 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 4 dim-1 vars, End of recursive call: 16 dim-0 vars, and 4 xjuncts. [2018-12-24 14:39:56,747 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 20 variables, input treesize:201, output treesize:141 [2018-12-24 14:39:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:39:56,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:39:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:39:57,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:39:57,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2018-12-24 14:39:57,012 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:39:57,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-24 14:39:57,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-24 14:39:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:39:57,013 INFO L87 Difference]: Start difference. First operand 9927 states and 70376 transitions. Second operand 13 states. [2018-12-24 14:39:57,201 WARN L181 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-12-24 14:39:57,470 WARN L181 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2018-12-24 14:39:57,758 WARN L181 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2018-12-24 14:39:58,950 WARN L181 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2018-12-24 14:40:00,554 WARN L181 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 88 [2018-12-24 14:40:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:40:13,769 INFO L93 Difference]: Finished difference Result 12394 states and 87417 transitions. [2018-12-24 14:40:13,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-24 14:40:13,769 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-12-24 14:40:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:40:13,809 INFO L225 Difference]: With dead ends: 12394 [2018-12-24 14:40:13,809 INFO L226 Difference]: Without dead ends: 12392 [2018-12-24 14:40:13,812 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2018-12-24 14:40:13,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2018-12-24 14:40:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 7195. [2018-12-24 14:40:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7195 states. [2018-12-24 14:40:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7195 states to 7195 states and 51194 transitions. [2018-12-24 14:40:23,343 INFO L78 Accepts]: Start accepts. Automaton has 7195 states and 51194 transitions. Word has length 7 [2018-12-24 14:40:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:40:23,343 INFO L480 AbstractCegarLoop]: Abstraction has 7195 states and 51194 transitions. [2018-12-24 14:40:23,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-24 14:40:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7195 states and 51194 transitions. [2018-12-24 14:40:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:40:23,349 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:40:23,349 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:40:23,349 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:40:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:40:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1937075524, now seen corresponding path program 1 times [2018-12-24 14:40:23,350 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:40:23,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:40:23,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:40:23,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:40:23,350 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:40:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:40:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:40:23,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:40:23,429 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:40:23,430 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:40:23,430 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [24], [28], [30], [31] [2018-12-24 14:40:23,431 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:40:23,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:40:23,730 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:40:23,730 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:40:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:40:23,730 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:40:23,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:40:23,730 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:40:23,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:40:23,740 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:40:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:40:23,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:40:23,749 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 21 treesize of output 24 [2018-12-24 14:40:23,753 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:40:23,767 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,770 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,770 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 26 treesize of output 36 [2018-12-24 14:40:23,773 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,774 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,775 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,776 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 28 treesize of output 50 [2018-12-24 14:40:23,780 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,782 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,784 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,784 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 30 treesize of output 68 [2018-12-24 14:40:23,788 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,789 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,791 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,792 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,793 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,794 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:40:23,794 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:23,830 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:23,850 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:23,867 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:23,879 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:23,892 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:23,918 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 63 treesize of output 56 [2018-12-24 14:40:23,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,935 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 53 treesize of output 63 [2018-12-24 14:40:23,969 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,971 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,973 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,974 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:23,974 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 68 [2018-12-24 14:40:24,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:40:24,081 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,082 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,083 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,084 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,085 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,086 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,087 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,089 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,090 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:40:24,090 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,112 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,134 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,157 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,183 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,360 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:40:24,360 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:84, output treesize:87 [2018-12-24 14:40:24,394 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,403 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:40:24,403 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:40:24,539 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:40:24,540 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:97, output treesize:138 [2018-12-24 14:40:24,635 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,636 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,637 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,638 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,639 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 90 [2018-12-24 14:40:24,639 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,720 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,721 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,722 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,723 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,724 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,725 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,726 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,727 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,728 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 127 [2018-12-24 14:40:24,728 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,805 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 2 xjuncts. [2018-12-24 14:40:24,805 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:150, output treesize:94 [2018-12-24 14:40:24,851 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,852 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,853 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,854 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,855 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,856 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,858 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,859 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,860 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:40:24,861 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,862 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 88 [2018-12-24 14:40:24,862 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:24,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,932 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,933 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,935 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,936 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,939 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,940 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,941 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,942 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:40:24,943 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:24,944 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 138 [2018-12-24 14:40:24,944 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:25,024 INFO L267 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 2 dim-1 vars, End of recursive call: 9 dim-0 vars, and 2 xjuncts. [2018-12-24 14:40:25,025 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 11 variables, input treesize:118, output treesize:100 [2018-12-24 14:40:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:40:25,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:40:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:40:25,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:40:25,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:40:25,162 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:40:25,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:40:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:40:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:40:25,162 INFO L87 Difference]: Start difference. First operand 7195 states and 51194 transitions. Second operand 10 states. [2018-12-24 14:40:25,600 WARN L181 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2018-12-24 14:40:27,416 WARN L181 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2018-12-24 14:40:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:40:36,083 INFO L93 Difference]: Finished difference Result 7367 states and 52064 transitions. [2018-12-24 14:40:36,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:40:36,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:40:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:40:36,107 INFO L225 Difference]: With dead ends: 7367 [2018-12-24 14:40:36,107 INFO L226 Difference]: Without dead ends: 7366 [2018-12-24 14:40:36,109 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-12-24 14:40:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2018-12-24 14:40:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7259. [2018-12-24 14:40:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7259 states. [2018-12-24 14:40:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 51642 transitions. [2018-12-24 14:40:46,101 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 51642 transitions. Word has length 7 [2018-12-24 14:40:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:40:46,101 INFO L480 AbstractCegarLoop]: Abstraction has 7259 states and 51642 transitions. [2018-12-24 14:40:46,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:40:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 51642 transitions. [2018-12-24 14:40:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:40:46,107 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:40:46,107 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:40:46,107 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:40:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:40:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1924490204, now seen corresponding path program 2 times [2018-12-24 14:40:46,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:40:46,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:40:46,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:40:46,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:40:46,108 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:40:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:40:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:40:46,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:40:46,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:40:46,255 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-24 14:40:46,255 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-24 14:40:46,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:40:46,255 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:40:46,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-24 14:40:46,264 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-24 14:40:46,270 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-24 14:40:46,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-24 14:40:46,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:40:46,292 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 21 treesize of output 24 [2018-12-24 14:40:46,295 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 24 treesize of output 30 [2018-12-24 14:40:46,297 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,298 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,299 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 26 treesize of output 40 [2018-12-24 14:40:46,303 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,304 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,305 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:40:46,310 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,311 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,313 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,314 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,315 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 30 treesize of output 72 [2018-12-24 14:40:46,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,321 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:40:46,323 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,364 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,385 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,403 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,417 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,430 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,462 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:40:46,499 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,500 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,501 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:40:46,541 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,542 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,545 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:40:46,595 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,596 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,597 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,598 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,600 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,601 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,601 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:40:46,659 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,661 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,662 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,663 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,664 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,665 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,666 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,667 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,668 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:40:46,668 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,693 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,717 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,742 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,768 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,812 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:40:46,812 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:92, output treesize:91 [2018-12-24 14:40:46,850 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,850 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:40:46,851 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,894 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:40:46,894 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:101, output treesize:71 [2018-12-24 14:40:46,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,929 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,930 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,931 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:46,932 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:40:46,933 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:46,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:40:46,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:81, output treesize:55 [2018-12-24 14:40:47,010 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,016 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,024 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:40:47,025 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:40:47,026 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:47,072 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:40:47,072 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:49 [2018-12-24 14:40:47,096 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,098 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,099 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,101 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,102 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,103 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,105 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,106 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,107 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,108 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:40:47,113 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:40:47,114 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 123 [2018-12-24 14:40:47,114 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:40:47,162 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. [2018-12-24 14:40:47,162 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:59, output treesize:49 [2018-12-24 14:40:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:40:47,422 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:40:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:40:47,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:40:47,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2018-12-24 14:40:47,490 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:40:47,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-24 14:40:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-24 14:40:47,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:40:47,491 INFO L87 Difference]: Start difference. First operand 7259 states and 51642 transitions. Second operand 11 states. [2018-12-24 14:41:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:41:04,803 INFO L93 Difference]: Finished difference Result 9936 states and 70364 transitions. [2018-12-24 14:41:04,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-24 14:41:04,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 7 [2018-12-24 14:41:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:41:04,837 INFO L225 Difference]: With dead ends: 9936 [2018-12-24 14:41:04,837 INFO L226 Difference]: Without dead ends: 9935 [2018-12-24 14:41:04,840 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2018-12-24 14:41:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9935 states. [2018-12-24 14:41:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9935 to 8951. [2018-12-24 14:41:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8951 states. [2018-12-24 14:41:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8951 states to 8951 states and 63743 transitions. [2018-12-24 14:41:19,904 INFO L78 Accepts]: Start accepts. Automaton has 8951 states and 63743 transitions. Word has length 7 [2018-12-24 14:41:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:41:19,905 INFO L480 AbstractCegarLoop]: Abstraction has 8951 states and 63743 transitions. [2018-12-24 14:41:19,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-24 14:41:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 8951 states and 63743 transitions. [2018-12-24 14:41:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:41:19,912 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:41:19,912 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:41:19,912 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:41:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:41:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1928257388, now seen corresponding path program 1 times [2018-12-24 14:41:19,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:41:19,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:41:19,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-24 14:41:19,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:41:19,913 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:41:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:41:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:41:20,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:41:20,006 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:41:20,006 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:41:20,006 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [24], [28], [30], [31] [2018-12-24 14:41:20,007 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:41:20,007 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:41:20,350 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:41:20,350 INFO L272 AbstractInterpreter]: Visited 7 different actions 11 times. Merged at 1 different actions 1 times. Never widened. Found 6 fixpoints after 4 different actions. Largest state had 0 variables. [2018-12-24 14:41:20,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:41:20,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:41:20,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:41:20,351 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:41:20,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:41:20,359 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:41:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:41:20,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:41:20,369 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 63 treesize of output 56 [2018-12-24 14:41:20,388 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,393 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 53 treesize of output 63 [2018-12-24 14:41:20,429 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,431 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,433 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,434 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,435 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 46 treesize of output 68 [2018-12-24 14:41:20,479 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,480 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,481 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,483 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,484 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,486 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,486 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 76 [2018-12-24 14:41:20,544 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,545 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,546 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,547 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,549 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,550 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,551 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,553 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,554 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 57 [2018-12-24 14:41:20,554 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,580 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,604 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,628 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,654 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,686 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:41:20,689 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:41:20,691 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:41:20,694 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:41:20,698 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 68 [2018-12-24 14:41:20,701 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 87 [2018-12-24 14:41:20,702 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,733 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,751 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,765 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,776 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,788 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:20,829 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:41:20,829 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:84, output treesize:87 [2018-12-24 14:41:20,860 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:20,869 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:41:20,870 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:41:21,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 7 dim-0 vars, and 2 xjuncts. [2018-12-24 14:41:21,007 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:97, output treesize:138 [2018-12-24 14:41:21,056 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,057 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:41:21,057 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 80 [2018-12-24 14:41:21,058 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:21,086 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:41:21,087 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:42 [2018-12-24 14:41:21,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:21,117 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 86 [2018-12-24 14:41:21,118 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:21,149 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:41:21,149 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:34 [2018-12-24 14:41:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:41:21,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:41:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:41:21,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:41:21,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2018-12-24 14:41:21,216 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:41:21,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-24 14:41:21,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-24 14:41:21,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-12-24 14:41:21,216 INFO L87 Difference]: Start difference. First operand 8951 states and 63743 transitions. Second operand 10 states. [2018-12-24 14:41:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:41:37,019 INFO L93 Difference]: Finished difference Result 9235 states and 65371 transitions. [2018-12-24 14:41:37,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-24 14:41:37,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2018-12-24 14:41:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:41:37,050 INFO L225 Difference]: With dead ends: 9235 [2018-12-24 14:41:37,050 INFO L226 Difference]: Without dead ends: 9232 [2018-12-24 14:41:37,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-12-24 14:41:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9232 states. [2018-12-24 14:41:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9232 to 9044. [2018-12-24 14:41:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9044 states. [2018-12-24 14:41:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9044 states to 9044 states and 64394 transitions. [2018-12-24 14:41:52,806 INFO L78 Accepts]: Start accepts. Automaton has 9044 states and 64394 transitions. Word has length 7 [2018-12-24 14:41:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:41:52,806 INFO L480 AbstractCegarLoop]: Abstraction has 9044 states and 64394 transitions. [2018-12-24 14:41:52,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-24 14:41:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 9044 states and 64394 transitions. [2018-12-24 14:41:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:41:52,814 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:41:52,814 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:41:52,814 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:41:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:41:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1928378538, now seen corresponding path program 1 times [2018-12-24 14:41:52,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:41:52,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:41:52,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:41:52,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:41:52,815 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:41:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:41:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-24 14:41:52,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:41:52,884 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:41:52,884 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:41:52,884 INFO L207 CegarAbsIntRunner]: [0], [6], [14], [28], [30], [32], [33] [2018-12-24 14:41:52,885 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:41:52,885 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:41:53,103 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:41:53,103 INFO L272 AbstractInterpreter]: Visited 7 different actions 10 times. Merged at 1 different actions 1 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 0 variables. [2018-12-24 14:41:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:41:53,103 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:41:53,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:41:53,103 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:41:53,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:41:53,112 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:41:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:41:53,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:41:53,139 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 43 treesize of output 39 [2018-12-24 14:41:53,153 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,155 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,156 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 36 treesize of output 49 [2018-12-24 14:41:53,185 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,186 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,188 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,189 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,190 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 32 treesize of output 57 [2018-12-24 14:41:53,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,227 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,228 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,229 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,232 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,232 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2018-12-24 14:41:53,233 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,248 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,262 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,278 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,300 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2018-12-24 14:41:53,303 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2018-12-24 14:41:53,306 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 36 [2018-12-24 14:41:53,309 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 50 [2018-12-24 14:41:53,314 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 30 treesize of output 68 [2018-12-24 14:41:53,323 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 67 [2018-12-24 14:41:53,323 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,347 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,365 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,377 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,388 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,400 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,428 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:41:53,429 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:64, output treesize:67 [2018-12-24 14:41:53,469 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,477 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 0 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 72 [2018-12-24 14:41:53,478 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2018-12-24 14:41:53,566 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2018-12-24 14:41:53,566 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:88 [2018-12-24 14:41:53,606 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,607 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,608 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:41:53,609 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:41:53,609 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 59 [2018-12-24 14:41:53,610 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:41:53,629 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:41:53,629 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:29 [2018-12-24 14:41:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:41:53,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:41:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:41:53,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:41:53,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2018-12-24 14:41:53,753 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:41:53,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-24 14:41:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-24 14:41:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-12-24 14:41:53,754 INFO L87 Difference]: Start difference. First operand 9044 states and 64394 transitions. Second operand 8 states. [2018-12-24 14:42:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:42:08,908 INFO L93 Difference]: Finished difference Result 9065 states and 64420 transitions. [2018-12-24 14:42:08,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-24 14:42:08,908 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-12-24 14:42:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:42:08,936 INFO L225 Difference]: With dead ends: 9065 [2018-12-24 14:42:08,937 INFO L226 Difference]: Without dead ends: 9064 [2018-12-24 14:42:08,939 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2018-12-24 14:42:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2018-12-24 14:42:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 9045. [2018-12-24 14:42:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9045 states. [2018-12-24 14:42:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 64401 transitions. [2018-12-24 14:42:24,550 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 64401 transitions. Word has length 7 [2018-12-24 14:42:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:42:24,551 INFO L480 AbstractCegarLoop]: Abstraction has 9045 states and 64401 transitions. [2018-12-24 14:42:24,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-24 14:42:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 64401 transitions. [2018-12-24 14:42:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:42:24,558 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:42:24,558 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:42:24,558 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:42:24,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:42:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1904967206, now seen corresponding path program 1 times [2018-12-24 14:42:24,559 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:42:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:42:24,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:42:24,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:42:24,559 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:42:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:42:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:42:24,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:42:24,772 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:42:24,772 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:42:24,772 INFO L207 CegarAbsIntRunner]: [0], [10], [14], [18], [22], [24], [27] [2018-12-24 14:42:24,772 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:42:24,773 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:42:25,206 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:42:25,207 INFO L272 AbstractInterpreter]: Visited 7 different actions 13 times. Merged at 1 different actions 1 times. Never widened. Found 10 fixpoints after 6 different actions. Largest state had 0 variables. [2018-12-24 14:42:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:42:25,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:42:25,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:42:25,207 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:42:25,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:42:25,216 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:42:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:42:25,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:42:25,248 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,249 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:42:25,289 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,291 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,292 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:42:25,333 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,335 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,336 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,337 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,338 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:42:25,387 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,389 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,390 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,391 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,393 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,395 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,395 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:42:25,453 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,454 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,455 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,457 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,458 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,460 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,461 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,463 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,463 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:42:25,464 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,494 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,522 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,554 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,585 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,624 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 21 treesize of output 24 [2018-12-24 14:42:25,633 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:42:25,635 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:42:25,637 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:42:25,640 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:42:25,644 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:42:25,644 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,677 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,697 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,712 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,725 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,736 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,778 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,779 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:92, output treesize:91 [2018-12-24 14:42:25,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,831 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:42:25,831 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,874 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:42:25,874 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:101, output treesize:71 [2018-12-24 14:42:25,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,937 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,938 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:25,939 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 103 [2018-12-24 14:42:25,939 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:25,982 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:42:25,982 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:55 [2018-12-24 14:42:26,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,024 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,027 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,028 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,029 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,029 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:42:26,030 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,031 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 118 [2018-12-24 14:42:26,032 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:26,079 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:42:26,080 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:47 [2018-12-24 14:42:26,109 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,110 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,111 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,112 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,113 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,114 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,115 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,116 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,117 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,118 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,119 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,121 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,122 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:42:26,122 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,123 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 124 [2018-12-24 14:42:26,124 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:26,172 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:42:26,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:49 [2018-12-24 14:42:26,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,203 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,204 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,205 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,206 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,207 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,208 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,209 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,210 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,211 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,212 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,213 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,214 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,215 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,216 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:42:26,216 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:42:26,217 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 127 [2018-12-24 14:42:26,218 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:42:26,266 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. [2018-12-24 14:42:26,266 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:63, output treesize:53 [2018-12-24 14:42:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:42:26,297 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:42:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:42:26,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:42:26,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2018-12-24 14:42:26,406 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:42:26,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-24 14:42:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-24 14:42:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:42:26,406 INFO L87 Difference]: Start difference. First operand 9045 states and 64401 transitions. Second operand 14 states. [2018-12-24 14:42:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-24 14:42:45,455 INFO L93 Difference]: Finished difference Result 9411 states and 66754 transitions. [2018-12-24 14:42:45,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-24 14:42:45,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 7 [2018-12-24 14:42:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-24 14:42:45,484 INFO L225 Difference]: With dead ends: 9411 [2018-12-24 14:42:45,484 INFO L226 Difference]: Without dead ends: 9409 [2018-12-24 14:42:45,486 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2018-12-24 14:42:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9409 states. [2018-12-24 14:43:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9409 to 8693. [2018-12-24 14:43:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8693 states. [2018-12-24 14:43:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 61400 transitions. [2018-12-24 14:43:02,366 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 61400 transitions. Word has length 7 [2018-12-24 14:43:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-24 14:43:02,366 INFO L480 AbstractCegarLoop]: Abstraction has 8693 states and 61400 transitions. [2018-12-24 14:43:02,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-24 14:43:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 61400 transitions. [2018-12-24 14:43:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-24 14:43:02,375 INFO L394 BasicCegarLoop]: Found error trace [2018-12-24 14:43:02,375 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-24 14:43:02,375 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr5ASSERT_VIOLATIONASSERT]=== [2018-12-24 14:43:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:43:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1916458534, now seen corresponding path program 1 times [2018-12-24 14:43:02,376 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-24 14:43:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:43:02,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:43:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-24 14:43:02,376 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-24 14:43:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:43:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:43:02,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:43:02,505 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-24 14:43:02,505 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 8 with the following transitions: [2018-12-24 14:43:02,505 INFO L207 CegarAbsIntRunner]: [0], [6], [10], [18], [22], [24], [27] [2018-12-24 14:43:02,507 INFO L148 AbstractInterpreter]: Using domain ArrayDomain [2018-12-24 14:43:02,507 INFO L101 FixpointEngine]: Starting fixpoint engine with domain ArrayDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-24 14:43:02,955 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-24 14:43:02,955 INFO L272 AbstractInterpreter]: Visited 7 different actions 13 times. Merged at 1 different actions 1 times. Never widened. Found 10 fixpoints after 6 different actions. Largest state had 0 variables. [2018-12-24 14:43:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-24 14:43:02,955 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-24 14:43:02,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-24 14:43:02,955 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-24 14:43:02,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-24 14:43:02,963 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-24 14:43:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-24 14:43:02,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-24 14:43:03,117 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-12-24 14:43:03,120 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,121 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 71 [2018-12-24 14:43:03,157 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,158 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,158 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 67 [2018-12-24 14:43:03,198 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,199 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,201 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,202 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,202 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 72 [2018-12-24 14:43:03,251 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,252 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,253 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,254 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,255 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,256 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,257 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 80 [2018-12-24 14:43:03,317 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,318 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,319 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,320 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,322 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,323 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,324 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,325 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,325 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 61 [2018-12-24 14:43:03,326 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,352 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,377 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,403 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,429 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,462 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 21 treesize of output 24 [2018-12-24 14:43:03,464 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 30 [2018-12-24 14:43:03,466 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 40 [2018-12-24 14:43:03,468 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2018-12-24 14:43:03,470 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 72 [2018-12-24 14:43:03,473 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 91 [2018-12-24 14:43:03,474 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,508 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,528 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,543 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,555 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,567 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,610 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-24 14:43:03,610 INFO L202 ElimStorePlain]: Needed 12 recursive calls to eliminate 3 variables, input treesize:92, output treesize:91 [2018-12-24 14:43:03,658 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,658 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 97 [2018-12-24 14:43:03,658 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,701 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:43:03,701 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:71 [2018-12-24 14:43:03,740 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,741 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,742 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,743 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,744 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,745 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,746 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,746 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:43:03,747 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 105 [2018-12-24 14:43:03,748 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,791 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-12-24 14:43:03,791 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:81, output treesize:59 [2018-12-24 14:43:03,825 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,826 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,827 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,828 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,829 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,830 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,831 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,832 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,834 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,835 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,836 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,836 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 111 [2018-12-24 14:43:03,837 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,883 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2018-12-24 14:43:03,884 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:47 [2018-12-24 14:43:03,913 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,914 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,915 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,916 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,917 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,918 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,919 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,920 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,921 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,922 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,923 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,924 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,925 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,926 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,927 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,928 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:03,928 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:43:03,929 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 124 [2018-12-24 14:43:03,930 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:03,978 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2018-12-24 14:43:03,978 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:45 [2018-12-24 14:43:04,008 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,009 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,011 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,012 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,013 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,014 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,015 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,017 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,018 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,019 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,020 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,021 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,022 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,023 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,024 INFO L683 Elim1Store]: detected equality via solver [2018-12-24 14:43:04,025 INFO L701 Elim1Store]: detected not equals via solver [2018-12-24 14:43:04,026 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 120 [2018-12-24 14:43:04,026 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-12-24 14:43:04,071 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. [2018-12-24 14:43:04,071 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:57, output treesize:49 [2018-12-24 14:43:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:43:04,102 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-24 14:43:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-24 14:43:04,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-24 14:43:04,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2018-12-24 14:43:04,203 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-24 14:43:04,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-24 14:43:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-24 14:43:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2018-12-24 14:43:04,204 INFO L87 Difference]: Start difference. First operand 8693 states and 61400 transitions. Second operand 14 states.